Method and system for manufacturing and oral soluble films and oral soluble films made by thereby

Abstract

An oral soluble film contains at least one active agent. Alternatively, a multi-layered film includes a plurality of layers, at least one at least one of the plurality of layers being an oral soluble film layer containing at least one active agent. The oral soluble film may be made, e.g., by a method comprising providing a well of a predetermined size; depositing a film forming composition in the well; metering a predetermined amount of an active agent composition in the well separately from the film forming composition, the active agent composition being different than the film forming composition, the film forming composition and the active agent composition forming a single layer in the well; and drying the single layer in the well to form the oral soluble film containing the at least one active agent.

Claims

1. A multilayer soluble film made by deposit, comprising: a first soluble layer not containing a pharmaceutical active agent; and a second soluble layer provided on the first-soluble layer by depositing a solution comprising materials forming the second soluble layer without direct mechanical intervention to form the solution into a film on the first soluble layer, the second-soluble layer containing at least one pharmaceutical active agent and having a surface area different than a surface area of the first soluble layer, wherein the first soluble layer is a mucoadhesive layer or a slowly dissolving backing layer.

2. The multilayer soluble film according to claim 1, wherein the first soluble layer is a mucoadhesive layer.

3. The multilayer soluble film according to claim 1, wherein the first soluble layer is a slowly dissolving backing layer.

4. The multilayer soluble film according to claim 3, wherein the second soluble layer has a mucoadhesive property.

5. The multilayer soluble film according to claim 1, wherein at least one of the first and second layers has a mesomorphic phase.

6. The multilayer soluble film according to claim 1, wherein the second soluble layer has a surface area smaller than a surface area of the first-soluble layer.

7. The multilayer soluble film according to claim 1, wherein the second soluble layer has a surface area larger than a surface area of the first-soluble layer.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a perspective view of a roll of pre-formed molds or wells prior to filling.

(2) FIG. 2 is a perspective view showing a deposit device filling a well of the roll of pre-formed molds or wells.

(3) FIG. 3 is an enlarged view of a portion in FIG. 2 showing a deposit device filling a well with a film former composition.

(4) FIG. 4 is an enlarged view of a portion in FIG. 2 showing a deposit device filling a well with active pharmaceutical ingredient with optional excipients, in particulate form.

(5) FIG. 5 is a perspective view showing a drying device deploying hot air currents from above the roll of film wells (which have been already filled).

(6) FIG. 6 is a perspective view showing adhesive being applied to well edges of bottom sheet.

(7) FIG. 7 is a perspective view showing a roll of wells, with films (and drug) deposited, films formed and dried, and guideposts inserted in the ends of the roll of wells for alignment of the top sheet which is placed over the bottom sheet.

(8) FIG. 8 is a perspective view showing a roll of wells, with films (and drug) deposited, films formed and dried, guideposts, and serration of individual doses within the roll of wells.

(9) FIG. 9 is a perspective view showing a finished dosage form removed from a roll of wells, the breakage lines occurring at the lines of serration.

(10) FIG. 10A is a top plan view of a first embodiment of a multilayer oral soluble film made by deposit.

(11) FIG. 10B is a cross-sectional view of first embodiment of a multilayer oral soluble film made by deposit along lines 10B-10B of FIG. 10A.

(12) FIG. 11A is a top plan view of a second embodiment of a multilayer oral soluble film made by deposit.

(13) FIG. 11B is a cross-sectional view of second embodiment of a multilayer oral soluble film made by deposit along lines 11B-11B of FIG. 11A.

(14) FIG. 12 is a schematic view of a system for manufacturing a pharmaceutical active agent-containing oral soluble film by deposit in a pattern.

(15) FIG. 13 is a cross-sectional view of a well contained in a sub-well.

(16) FIG. 14 is a schematic view showing a system and method for pre-releasing the film from the bottom of the mold or well.

(17) FIG. 15 is a plan view of a rectangular-shaped well.

(18) FIG. 16 is a cross-sectional view of the rectangular well along lines 16-16 of FIG. 15.

(19) FIG. 17 is a cross-sectional view of a well according to certain embodiments of the invention;

(20) FIG. 18 is an enlarged portion of FIG. 17.

(21) FIG. 19 is an enlarged portion of FIG. 17.

(22) FIGS. 20A and 20B are cross-sectional views of a well that is convex and can be pushed to concave to present the film for easy access by the patient.

DETAILED DESCRIPTION OF THE INVENTION

(23) One aspect of the present invention relates to a system for manufacturing an oral soluble film with an active agent, e.g., a pharmaceutical oral soluble film by the deposition of active and film former composition separately into a mold or well.

(24) One aspect of the present invention relates to a system for manufacturing an oral soluble film with an active agent, e.g., a pharmaceutical oral soluble film by the deposition of active pharmaceutical agent(s) and film former together into a mold or well.

(25) One aspect of the present invention relates to a system of continuous manufacture (formation of oral soluble films) and primary packaging of the oral soluble films.

(26) One aspect of the present invention relates to a system for manufacturing an oral soluble film in which the active agent is deposited into a mold or well separately from the film former, and the drug binds or diffuses adequately mixes into the final, dried film matrix.

(27) One aspect of present invention relates to a method of forming an oral soluble film with an active agent, e.g., a pharmaceutical oral soluble film without direct mechanical intervention to spread and/or coat and/or cast the composition into a film, such as by deposit of a sufficiently flowable film former composition into a well or mold and.

(28) One aspect of the present invention relates to the use of a compressed gas to encourage and/or speed the flow of a film composition into a film shape in a mold or well.

(29) One aspect of the present invention relates to the use of a compressed gas to encourage mixing of an active agent with a film former composition in a mold or well.

(30) One aspect of the present invention relates to the use of brief vibration to encourage and/or speed up mixing of an active agent with a film former composition in a mold or well.

(31) One aspect of the present invention relates to the use of brief vibration to encourage and/or speed up the flow of a film composition into a film well shape.

(32) One aspect of the present invention relates to the manufacture of a film-sheet 1 to 40 mils (measured as dry thickness). This is non-limiting and the methodology here allows for thick films and for dermal products.

(33) One aspect of the present invention relates to a mold or well shape that is optimized for film formation by deposit method.

(34) One aspect of the present invention replaces to mold or well material that is selected to be a suitable surface energy substrate to facilitate wetting and spreading of film former composition, i.e. low contact angle and/or surface tension.

(35) One aspect of the present invention relates to pre-treating a mold or well with a surface active agent, a surfactant, or other agent to either promote flow of the film composition, and/or promote easier release of the dried film.

(36) One aspect of the present invention where the surface of the well may have modified textures, indentations, coatings or heat treatment to vary or affect the flow pattern of the film composition.

(37) One aspect of the present invention relates to a composition suitable for making an oral soluble film where the viscosity and/or surface tension and/or interfacial tension of the composition (with the well/mold material, as applicable) is selected to promote flowability of said composition sufficient to form a film in a mold or well, and in certain embodiments to form such a film rapidly in such mold or well. This categorically teaches away from cast film art in that high viscosity is antithetical to successful formation of a deposit by precluding adequate flowability of the film former composition into a mold or well.

(38) One aspect of the present invention relates to a film former composition with sufficient wettability to mix adequately in a mold or well with a separately deposited active.

(39) One aspect of the present invention relates an oral soluble film made with one or more low molecular weight polymers as film formers

(40) One aspect of the present invention relates to a composition suitable for making an oral soluble film by the deposit method, where such composition is not capable of being wet cast into a film using traditional wet cast coating technologies (e.g. by three roll coater, or doctor blade).

(41) One aspect of the present invention involves an alignment system to ensure the mold or well sheet is aligned with the top sheet. For example, aligning openings on the well sheet and the top sheet may be used so that through, for example, a pin type alignment each is properly oriented to the other.

(42) One aspect of the present invention relates to a drying process that is suitable for the deposited composition to immediately flow into the shape of the mold or well prior to becoming too viscous to flow as a result of loss of solvent effecting viscosity increase.

(43) One aspect of the present invention relates to the material of the mold or well selected that is suitable for the flow of the composition into a film.

(44) One aspect of the present invention relates to the material of the mold or well selected to simultaneously allow the flow of the readily flowing composition while also allowing the dried material to be readily removed or peeled away from the well.

(45) One aspect of the present invention relates to the design of the mold or well so that a user can readily remove the film.

(46) One aspect of the present invention can allow the dosage unit to be sealed (primary packaging) on the same production line as the film is manufactured if desired. Alternatively, the dosage unit can be sealed on an adjacent packaging line. Standard packaging at a later time is also allowable.

(47) One aspect of the invention deals with the stop-start (or stutter) of the film-by-depost production line, which may be in connection, inter alia, with deposit of a material, drying of the material or drying of a layer, or application of the topsheet.

(48) One aspect of the invention relates to the substrate/laminate layer with pre-formed wells made at line or before line by blister forming methods.

(49) One aspect of the present invention relates to the blisters being collapsible such that when the substrate layer is rolled up on itself, the film within it is loosened enabling easy subsequent removal by the user.

(50) One aspect of the present invention relates to the manufacture and packaging of an oral soluble film, including a multi-layer film, with minimal composition and API loss (less than 30% preferably less than 20%, more preferably less than 10%, even more preferably less than 5%).

(51) One aspect of the present invention relates to a oral soluble film composition that has little or no yield stress. Such compositions are particularly well suited for the present invention (i.e. formation of an oral soluble film by deposit method).

(52) One aspect of the invention involves a rolled adhesive onto the dried bottom sheet/mold/well edges, but excluding the interior of the sheet/mold/wells, so that top sheet can be adhered.

(53) One aspect of the present invention relates to a topsheet on the film wells that is printed for the blister, i.e. not gangprinted.

(54) One aspect of the present invention relates to indicia or identifiers on the individual film that are not gangprinted.

(55) One aspect of the present invention relates to a film former composition with a viscosity below 2000 centipoise, preferably below 1000, more preferably below 600 centipoise, still more preferably below 300 centipoise. Such measurements, in the case of a Non-Newtonian film former composition, are measured at low shear rate, <10 s.sup.−1

(56) One aspect of the present invention relates to the use of viscosity reducing agents in oral soluble film compositions. This teaches against the viscosity needed in traditional, wet cast films.

(57) One aspect of the present invention relates to an oral soluble film with sufficiently uniform thickness and appearance for the user, with optional uniform distribution of components in the film. One embodiment of the present invention relates to an oral soluble film that does not have uniform distribution of active agent within the film.

(58) One aspect of the present invention relates to an oral soluble film, made by deposit method, with <20% variability in height, preferably with <10% variability in height (measured from the thickest portion of the film to the thinnest portion, measured vertically). Other embodiments of the oral soluble film of the present invention will have greater variability, particularly where unique shapes are intended with varied film topography

(59) One aspect of the present invention relates to an oral soluble film, made by deposit method, with one or more active agents, e.g., active pharmaceutical agents, wherein the content of said active pharmaceutical agent(s) varies less than 10% from the label claim, preferably less than 5%, preferably less than 2% from the label claim.

(60) One aspect of the present invention relates to a multi-layer film made by deposit method.

(61) One aspect of the present invention relates to the manufacture of a transdermal film, in whole or in part, by the deposit method.

(62) One aspect of the present invention relates to the manufacture of films by deposit for wound care, internal or external to the body.

(63) One aspect of the present invention relates to the manufacture of films by deposit for use in the nasal cavity.

(64) One aspect of the present invention relates to the manufacture of films by deposit for use in the vagina.

(65) One aspect of the present invention elates to the manufacture of films by deposit for use in the anal cavity.

(66) One aspect of this invention is for film comprising a surface numbing agent for use in the skin and in the mouth and in the anus.

(67) While the primary embodiment involves a soluble film for oral use, non-oral uses are expressly contemplated in connection with films of the present invention made by deposit.

(68) The composition may be deposited within the well as a single or multiple droplets or sprays at a single centered or off-centered position within the well. Or as multiple discrete droplets or sprays at multiple lateral locations within the well for differential deposition. This may be accomplished by multiple nozzles or, as shown in FIG. 12 by a single nozzle 3 located on a movable X-Y gantry 14 that can move in a lateral (or other) motion to lay droplets or strands of solution (or powder) into the well 2 in various patterns. One or more nozzles may be on a movable x-y gantry that deposits into the well in depositing pattern, a particular geometric shape, or both. The geometric shape may be polygonal, circular, elliptical, zig zag or any other shape caused when the nozzle is not stationary. The shape may involve articulation of the nozzle, movement of the well during deposit or both.

(69) In another aspect of the invention, a method of making an oral soluble film, containing at least one active agent, includes providing a well of a predetermined size and/or shape; depositing a film forming composition including at least one active agent in the well, the film forming composition spread within the well by using mechanical means to move the depositing nozzle around to deposit at different locations within the same well to ‘paint’ different areas of the well with film forming composition in patterns to obtain film with variable thickness or ridges. For example, as shown in FIG. 12, the nozzle 3 can articulate in a swinging fashion as shown by the arrows 15. In this manner, the film former solution can be deposited in a shape selected from the group of: circular, elliptical, polygonal or zig-zag. The nozzle can pulsate on-off during deposit or may be configured to deposit with continuous flow.

(70) One aspect of the oral soluble film where the edge or rim or circumference or border of the film is thicker than the center of the film to improve tear resistance of the film. This may be accomplished by differential deposition or by modifying the geometry of the well structure. For example, the well structure may have a deeper perimeter at the edge or rim to effect increased thickness at the edge or rim of the film.

(71) In certain embodiments, the edge (or the edge in a particular geography of the film, i.e. not the entire perimeter, edge, rim, circumference) has a thickness that is more than 10% thicker than the center, preferably more than 20% thicker than the center, even more preferably more than 30% thicker than the center. For example and without limitation, at least part of the edge only may have increased thickness over the center.

(72) In certain embodiments, the edge (or the rim, perimeter, rim or circumference) (or the edge in a particular geography of the film, i.e. not the entire perimeter (or rim, or circumference)) has a thickness that is more than 10% thicker than the center of the film or than the film's average thickness, preferably more than 20% thicker than the film's average thickness, even more preferably more than 30% thicker than the film's average thickness. For example, and without limitation, at least part of the edge may have increased thickness over the center. This can be achieved using a well of the type shown in FIGS. 17 and 19, described hereinafter.

(73) One aspect of the invention where the well structures may be modified by using 3-D printed or CNC milled inserts placed within a larger mold to achieve a variety of quickly changeable mold shapes for different shapes and size of film.

(74) One aspect of the invention is to allow for intermittent movement of the well substrate along the production line as opposed to the continuous movement demanded by the wet casting method.

(75) Preferred embodiments of the present invention is described herein with reference to FIGS. 1-9, which schematically show examples of the method and system of the present invention. However, applicants' invention is not limited to the particular embodiments/examples shown in the figures.

(76) FIG. 1 shows a roll 1 of pre-formed molds or wells 2 prior to filling by deposit. In other embodiments, the mold or well 2 may be formed on the production line itself from flat roll stock.

(77) FIG. 2 shows a deposit device 3, described in more detail hereinafter, filling a well. The deposit device 3 may be depositing film former composition, an active agent composition with optional excipients, or a film former composition complete with an active agent within it. In FIG. 2, the film former composition, the active agent composition with optional excipients, or a film former composition complete with an active agent are all designated generally with the reference numeral 4.

(78) FIG. 3 shows a deposit device 3 filling a well 2 with a film former composition 4a.

(79) FIG. 4 shows a deposit device 3 filling a well 2 with a composition 4b including active ingredient(s) with optional excipients, in particulate form.

(80) In one aspect of the present invention, a film forming composition 4a is deposited in each well 2 and an active agent composition 4b is deposited in each well 2, the active agent composition 4b being different than the film forming composition 4a. The film forming composition 4a and the active agent composition 4b form an admixture in the well 2. The film forming composition 4a and the active agent composition 4b may be separately deposited in the well 2 at the same time, e.g., through two separate deposit devices 3. Alternatively, depositing of the film forming composition 4a and the active agent composition 4b in each well 2 are carried out sequentially; in this embodiment, it is preferable but not necessary that the active agent composition 4a is first deposited in the well and then the film forming composition 4b is deposited in the well.

(81) FIG. 5 shows a drying device 5 deploying hot air currents from above the roll of film wells 2 (which have been already filled). In certain embodiments, drying occurs in a drying tunnel (here the tunnel is cut away for better visibility).

(82) FIG. 6 shows adhesive 6 being applied to well edges, i.e., to areas of the bottom sheet 1 outside the wells 2 by an applicator 7.

(83) FIG. 7 shows a roll 1 of wells 2, with films (and drug) 4 deposited, films formed and dried, and guideposts 8 inserted in the ends of the roll 1 of wells 2 for alignment of a top sheet 9 which is placed over the bottom sheet 1.

(84) FIG. 8 shows a roll 1 of wells 2, with films (and drug) 4 deposited, films formed and dried, guideposts 8, and serration 11 of individual doses 10 within the roll of wells. Serration can occur in the roll stock prior to deposit of film composition 4 or after the manufacture of film 4.

(85) FIG. 9 shows a finished dosage form 10 removed from a roll 1 of wells 2, the breakage lines occurring at the lines of serration 11.

(86) A summary comparison of films made by certain embodiments of the deposit method of the present invention and films made by wet casting is provided below.

(87) TABLE-US-00001 Parameter/Attribute Wet Cast Oral Soluble Film Deposit Oral Soluble Film Viscosity of film former High Low or optionally high composition Flowability of film former Low/None Low or optionally high composition Where Active Drug is Mixed with film former Deposited separately from added in process prior to coating on substrate film former composition (or optionally together) Substrate in Continuous Coating must occur on Deposit in mold/well is not Motion substrate in continuous continuous (optionally motion continuous) Coating substrate removal Coating substrate must be Substrate is typically not removed in conversion prior removed; deposited in final to packaging primary packaging Angle of Flow of film High angle of flow of film Low angle of flow of film former composition former composition former composition Stoke's Law employed to Stoke's Law employed to Stoke's Law has virtually maintain drug content maintain drug content no application where drug is uniformity in film former uniformity in film former deposited separately. composition composition Controlled drying necessary Controlled drying necessary Controlled drying not for drug content uniformity for drug content uniformity necessary for drug content uniformity Cutting of film specific size Cutting of film specific size Cutting of film not required required to make final required to make final to make final dosage form dosage form dosage form Rapid drying required for Rapid drying required for Rapid drying not required drug content uniformity? drug content uniformity for drug content uniformity Active Drug Waste (loss in High API Waste Low API Waste process) Coating steps for Bi-layer Typically two separate steps Can be made in single film of coating deposit step. Cost for Bi-layer Typically expensive (two Marginally longer deposit steps) step. Inexpensive Low Dose Content Potentially challenging Not challenging Uniformity Air bubbles, voids and Air bubbles, voids and Air bubbles, voids and surface defects create surface defects create surface defects do not create content uniformity issues content uniformity issues content uniformity issues Separation of incompatible Difficult Simple using separate drug actives in a deposit steps combination product Film Thickness Film thickness must be Film thickness can vary as uniform for drug content long as volumetrically uniformity accurate droplet is deposited Liquid suspension, solution, Can be deposited efficiently Deposition is not difficult. emulsion, gel, jellies, jams, but cannot be cast mousse, pudding, gelatin, etc.

(88) One aspect of the present invention is to enable film formulations which would have not have adequate mechanical properties for traditional oral soluble film manufacturing, i.e. ability to wind into a roll, ability to be trimmed and covered, ability to be released or peeled away from substrate, and ability to be converted in a conventional film packaging machine (e.g. a Doyen Medipharm machine). For example, a formulation that has insufficient tensile strength for conventional conversion, or a formulation that has propensity for elongation under stress, would be unable to be converted using conventional means but is able to be manufactured using the deposit method.

(89) The drug that is being deposited may be in the form of a powder or a solution in which case the drug solution in the bulk tank from which it is being deposited into wells in aliquots does not have to be stirred. However, it may also be a suspension of fine drug particles that may be continuously and vigorously stirred while the suspension is being deposited in aliquots into wells. Continuous stirring is generally not possible with viscous drug suspensions such as those used in formulations for continuous coating due to the induction of air into the mix which causes film defects and precludes collection of good and uniform product. In the deposit method, the low viscosity generally does not allow air bubbles to form in the film as they are immediately dissipated as the deposited liquid flows into the well as a thin layer. Embodiments where the active drug suspension is separately deposited into the well or mold, it may need to contain none to very low quantities of binder allowing incessant and high-speed mixing thereby preventing settling and ensuring uniformity.

(90) Applicants teach against the fundamental theme of prior film art (Yang et al, Horstman, etc), namely, the use of high viscosity to (i) prevent migration of the active and preserve uniformity of dose content in the mixing stage, (ii) enable the required coating thickness of the film composition, and (iii) prevent migration of the active and preserve content uniformity in the drying stage. Instead, high viscosity (and surface tension) here work contrary to (i) the ability to deposit the film former composition into the well or mold, and (ii) the ability of the film former to flow (and reasonably rapidly and without mechanical intervention) into a film within the well or mold.

(91) Deposit of a high viscosity film former composition such as those taught by Yang et al. in a well or mold will not generally result in a film at all, but rather simply a dollop-type shape of film former absent physical, mechanical intervention to spread the film former into a film (like a doctor blade, or other coating apparatus). Viscosity and surface tension simply prevent such compositions from flow, let alone sufficient flow to form a film.

(92) It is important to note that to accurately dose and spread film former in a well, a relatively low viscosity is required (and surface tension), otherwise the material will refuse to spread in the well and simple form a dollop of material in part of the well.

(93) Moreover, the embodiments where the drug active is separately deposited in the well or mold, high viscosity and lack of wetting can actually interfere with mixing of the drug active into the film matrix, thereby preventing adequate mixing of drug and film former composition from occurring.

(94) High viscosity is also not needed to enable coating thickness of the composition; in the deposit method of the present invention the film composition can be readily deposited as high as the sides of the well or mold. In certain embodiments, surface tension allows the composition to be deposited higher than the sides of the well or mold, and then shrink below during drying which may form slightly cup shaped films from a side profile.

(95) Film former and active are metered into the wells either singly or by multiple metering devices.

(96) It is important to note that to accurately dose and spread film former in a well, a relatively low viscosity is required (and surface tension), otherwise the material will refuse to wet and spread in the well and simply form a dollop of material in part of the well. Various methods to promote spread are discussed herein.

(97) Preferably, the after deposit, the film former composition will flow into a film in a well or mold within ninety seconds, preferably within sixty seconds, more preferably within twenty seconds, even more preferably within five seconds, and most preferably within one second. By flow into a film, Applicants mean that the film former composition will either reach the ends of the mold/well, or otherwise cease to flow.

(98) This time is important as it will impact production line speed. Output of course may be improved by using a bank of feeders (filling multiple wells forward and horizontally at one time).

(99) Both viscosity and surface tension are connected theoretically to inter-molecular forces, but they are still very different concepts.

(100) Shear Stress is a force that acts on a fluid to cause flow and the viscosity determines velocity gradient. Viscosity is an intrinsic property of the fluid itself. Viscosity is the ratio of the shear stress tensor to the rate of deformation tensor. Roughly speaking, viscosity determines how momentum is transported through a fluid during flow, as it is a measure of resistance to flow.

(101) Contact angle acts not inside the substance, but only on its interfacial boundary with substance of another phase, even if nothing moves. It is not a property of the substance itself, but of a pair of these phases meeting at the boundary. Often the expression “contact angle of water” is used; but what is meant is contact angle of the pair water-air. Combinations water-glass or water-oil have different value of contact angle. Roughly speaking, contact angle says how much energy of interaction is stored when two chemical species are in mutual contact, even in equilibrium.

(102) One way to think about the effective flowability of a film former composition for a given type of surface, is Young's equation. A drop of liquid when placed on a flat, homogenous solid surface comes to equilibrium, assuming a shape which minimizes the total free energy of the system. The angle between the liquid and the solid is called the contact angle, the angle being measured through the liquid. The contact angle may be calculated if the surface tension and interfacial tension are known, using Young's equation (see en.wikipedia.org/wiki/Wetting#Ideal solid surfaces, which is incorporated by reference as if fully stated herein, as retrieved on 3/26/17). For certain embodiments of the present invention, surface tension and interfacial tension are minimized to reduce the contact angle of the system.

(103) To wet the substrate well, the contact angle must be <90°.

(104) One way to think about the rate of flow or spreading of the composition, is Tanner's law. Tanner's law teaches that the rate of spreading of a droplet is related inversely to the viscosity of the droplet. See Bonn et al, “Wetting and Spreading” (hereby incorporated by reference as if full set forth herein, and Krishnakumar, “Wetting and Spreading Phenomena, available here: guava.physics.uiuc.edu/˜nigel/courses/563/Essays_2010/PDF/Krishnakumar.pdf and similarly hereby incorporated by reference as if fully set forth herein).

(105) The preceding teaches away from Yang et al, wherein the film composition yields a high contact angle on the substrate, which allows for relatively thick non-flowing compositions. In fact, wet cast film coatings are so thick and unflowable, Watson has taken the position in its Suboxone ANDA litigation that its film coating should be understood to be a solid immediately after coating: “The physical evidence demonstrates that Watson's casting dispersion forms a viscolelastic solid when the forces of mixing and pumping cease, which happens before the initiation of drying . . . . The inspection video demonstrates that: (1) by the time Watson's casting dispersion travels up a steep incline for 30 seconds, and prior to any drying, it has already gained sufficient structure to “lock-in” and prevent migration of the active such that the casting dispersion does not flow backwards down the incline, as it would if it were a viscoelastic liquid; (2) Watson's films are cast as in discrete lanes at the width of the final film, which would not be possible if the casting dispersion were a viscoelastic liquid . . . ” From Document 186, pp. 10-11, Case 1:14-cv-01574-RGA (District Court for Delaware). Thus Watson is stating to the Court that its film composition is simply not flowable at all, absent the mechanical intervention of the coating apparatus

(106) Film compositions of the present invention may be non-Newtonian or Newtonian. It should be noted that in the preferred embodiment, no mechanical force is applied to the film composition after deposit into the mold or well to encourage spreading/flowing of the film former composition. Accordingly, shear thinning or pseudo plastic attributes do not materially effect flowability in the well or mold since there is generally no mechanical source of shear stress other than gravity to affect a reduction in viscosity (as we would see in a coating apparatus).

(107) It is contemplated in certain embodiments that shear force may be achieved by pressurized delivery of film former composition into the well (such shear being affected by the impact of the film former composition against the well). However, there are practical limitations on how much shear can be achieved in this manner with substantial absence of splatter outside of the well. Nozzle design can be optimized to reduce or mitigate splatter. Nozzles may also have check valves and other features to prevent dripping of solutions from the nozzle or prevent strands of solution from the nozzle to the well.

(108) Film compositions of the present invention may have little or no yield stress. In certain embodiments, film compositions of the present invention will have insufficient yield stress to prevent flow on an incline greater than 45%, greater than 25% or even greater than 10%. In certain embodiments, the film composition of the present invention will have a yield stress <50 pa, preferably <30 pa, most preferably <15 pa.

(109) The focus of the present invention teaches away from the thinking in the cast film art to use high yield stress to prevent sedimentation of drug particles and other components.

(110) Continuous or Stuttered Manufacture

(111) Embodiments of the present invention may employ continuous manufacture or stuttered (intermittent) manufacture.

(112) In conventional wet casting, the substrate must be coated continuously. There is time (and waste) associated with bringing the coating process online to operating parameters with appropriate coating thickness. As a practical matter, the process must be continuous. This continuous coating typically implies long drying ovens.

(113) Certain embodiments of the deposit method allow for a stuttered manufacturing process. One or more molds/wells is filled. At this time, the mold/well rollstock is stationary or moving (relative to the filler apparatus). After filling, the mold/well can be moved to a dryer. In certain embodiments, the filler may move with the mold/well so as to have no relative speed as between them during filling. Again, the molds or wells may continuously move through the dryer or it may be stationary in the dryer. The dryer apparatus may also be deployed after filling in a single place (i.e. without the mold/well moving).

(114) In many embodiments, the deposit of film former composition and drug (and ensuing flowing into a wet film in the mold/well) is faster than the drying stage. Because deposit is non-continuous, in some embodiments, the mold/wells may be in stage blocks that can be placed or moved on belt feeds into an oven on multiple levels. This allows for a small dryer footprint to accommodate relatively high production.

(115) In other embodiments, there may be two separate banks of feeders, say for multi-layer films. One bank of feeders is placed before an initial drying section. A film is formed (for example, a backing layer). After initial drying, a second feeder bank deposits the next layer (for example, a drug containing layer). After this second feeder bank, there is another drying stage. The line may stutter, at the same time, or separately stutter.

(116) The stuttered option for deposit allows for a very efficient manufacturing in terms of footprint. Skilled artisans will appreciate the various configurations for deposit, drying, and packaging overlay on the molds/wells. A circular or other return layout between filler and dryer may be employed where a follow deposit is desired to be made to an initial dried film layer.

(117) A key advantage is the manufacture of the film product, from start to finished primary packaging, in a single line.

(118) Methods of Deposit

(119) Generally, the materials will be deposited in the well or mold using a flowmeter enabled feeder (any suitable flowmeter and feeder may be employed). The flowmeter may measure mass and/or volumetric flow rate of a liquid or solid. K-tron is a non-limitative example of a suitable feeder. Any suitable apparatus that can reliability deposit filmer former composition or drug may be employed.

(120) Apart from gravity feed, pumps may be employed to feed the material into the well. Speed of deposit is important for line speed/product output. Moreover, it may be desirable to inject material into the mold or well with some additional force beyond gravitational force.

(121) A bank of feeders may be employed to allow for a number of wells/molds across (and forwards) to be simultaneously. Optionally, the bank of feeders may source from a single mother tank, or from a plurality of tanks (or hoppers).

(122) Where the drug is deposited separately, multiple feeders may be employed: one to supply an active drug (or drug combination) (optionally with one or more suitable excipients), and one to supply the film former composition. The drug may be contained in a single mother tank (or hopper), or a plurality of tanks (or hoppers).

(123) If the active drug is a particle, the active drug may be delivered in dry powder form, or in solution (where soluble), suspension or emulsion. One advantage of dry powder form is to avoid the time during which the drug active is in contact with liquid (which can avoid problems with crystallization, drug stability, and the degradation of taste masking or controlled release systems).

(124) Where the drug is soluble, certain embodiments may use a pH for the drug solution optimized for solubility (where pH buffer of the film former composition uses a different, stronger buffer to control the ultimate pH of the dosage form). The drug may be solubilized in any appropriate polar or non-polar solvent.

(125) One advantage of a solution, suspension or emulsion, is to promote mixing of the pharmaceutically active agent with the film former composition, though it is demonstrated in examples below that dry particles can be adequately mixed with separately metered film former compositions.

(126) The feeders may employ nozzles that are optimized to promote mixing. For example, the nozzle may be selected to broadly disperse material in the well. The nozzle may be aimed to initiate flow in the well or mold. Where the drug is administered separately, the nozzle depositing the drug and the nozzle depositing the film former composition may be aimed in a complimentary fashion to promote mixing of the two. As a non-limitative example, the nozzles may direct the flow of the film former composition and drug in opposite directions. Nozzles may have a design to encourage mixing. In addition, nozzles may be used that have a spray pattern which is matched or otherwise calibrated to the well dimension.

(127) Nozzles can be articulated to move position relative to the geography of the well or mold during deposit. Such articulation may be useful for a range of purposes, including without limitation: (a) more evenly spreading the polymer and/or drug in the well or mold; (b) permitting faster deposit of the material to shorten the time it takes to spread the material adequately in the mold or well; and (c) with a less flowable composition, to create an intentional (intended) thickness in certain geographies of the film.

(128) Nozzle articulation, when depositing, may be circular, square, trapezoidal, or any shape. It may deposit in parallel lines, or in zig-zag fashion. The nozzle may disperse continuously during articulation (continuous flow), or may pulsate on-off, in some cases coordinated with the movement-geography of the nozzle articulation.

(129) Pressure from the nozzle may be constant or may pulsate intentionally.

(130) The above described nozzle articulation is in addition to embodiments where the feeder bank may itself move in a coordinated fashion with the wells or molds to be filled.

(131) Where the drug is administered separately from the film former composition, the two may be deposited in sequence, or contemporaneously (in which case the deposit rates may be calibrated in terms of time), or metered in a rotating sequence (for example and without limitation, film former composition, drug: drug, film former composition). Where multiple drugs, and/or multiple film layers are used, the sequences can become more coupled (for example, and without limitation): Drug, film former composition, drug, film former composition. Film former composition, drug, film former composition, drug, film former composition. Backing layer composition, drug, film former composition. Backing layer composition, film former composition, drug. Drug, film former composition, backing layer composition. Film former composition, drug, backing layer composition.

(132) Where delivered separately, each of the film former composition and the drug (be it in particulate, solution, suspension, emulsion etc) may optionally be paired with any suitable excipient.

(133) Separate administration of film former composition from drug is the preferred embodiment. First, the viscosities of a film former composition to resist sedimentation of the active would be too high for the film-by-deposit method of the present invention. Second, even soluble drugs may tend to come out of solubility in the film former composition, due to the relative low levels of solvent, interaction with other materials in the film former composition, and other chemical processes. Generally, greater control and reliability of target dose deposit is associated with separate administration of drug.

(134) Drugs may be separately and sequentially deposited in the case of incompatible drugs. For example, multiple layers may deposited, each with a different active. In certain embodiments, the second layer is deposited after the preceding lawyer has been dried. In some instances, the active and the film former and the excipients could all be in one mix and dispensed simultaneously through a single deposition from one deposer. In embodiments in which the second layer deposited after the first layer is dried, it could be on top and include, without limitation, active in sustained release form, taste masking, absorption enhancers, pH modifiers and other modifiers such as an acid and base to produce effervescence. When introduced however, with things like coloring the mix, the top could become the bottom re the patient directions.

(135) It may be desirable to heat the film former composition to promote flowability prior to, or after deposited in the mold or well. Attention must be paid to degradation temperature, and the sustained temperature should not exceed the drugs's known degradation temperature. Temperature increase will tend to decrease viscosity and surface tension provided that the solvent is not permitted to escape (or otherwise not replenished).

(136) The Well or Mold

(137) In this application, we use the terms well and mold interchangeably.

(138) The well or mold will generally be of suitable depth to contain the wet height of the desired film composition. As a practical matter, the film tends to reduce in thickness when dried.

(139) The well or mold may be pretreated with silicone, hydrophobic agents, surfactants or and other suitable material that promotes flow of the film composition and/or promotes release of the final dry film from the well or mold. In certain embodiments, the pre-treatment agent to promote release is a powder. Preferably, the powder is not soluble (or substantially insoluble) in water or other solvent deposited with the film forming composition. In certain embodiments, the pretreatment agent is combined with a sweetener and/or flavor so as to avoid imparting unpleasant taste to film dosage unit.

(140) The pretreatment agent may be applied to the forming material before or after the formation of the well or mold. However, in preferred embodiments it is applied after formation of the well or mold, and preferably via a spray method. Individual spray pump nozzles may be employed, particularly to avoid or substantially avoid application of the pre-treatment agent to the outer portion of the well or mold where the top sheet is sealed.

(141) Round shapes of the well or mold are desirable, but non limiting, to form a round film. Circular shapes may be particularly desirable but square or rectangular forms are also possible, as shown in FIGS. 15 and 16. In the case of circular shapes, the film composition can be deposited in the center and flow outward. Any regular or irregular polygonal shape may also be possible. The mold or well may also be shaped for form three dimensional attributes on the bottom of the film.

(142) The sides of the well or mold may be perpendicular or angled (outward from the planar bottom surface) as shown in FIGS. 15 and 16. The sides may be curved, and the bottom may be curved.

(143) In certain embodiments, the well or mold is sufficiently flexible to allow a consumer to readily push the bottom of the well or mold up to present the film for easy access by the patient. In one embodiment shown in FIGS. 20A and 20B, the well 2 is convex (see FIG. 20A) but can be pushed to concave (see FIG. 20B) to present the film 4 for easy access by the patient. In certain embodiments, when pushed to concave, the well stays concave. In other embodiments, the well snaps back to convex when support is removed.

(144) In other embodiments, the sides of the well are designed to collapse upwards towards the top sheet (typically after the top sheet has been removed prior to use) to present to film for easier access. For example, as shown in FIGS. 17 and 18, the sides of the well 2 may be formed like or in an accordion shape 18 as more clearly shown in FIG. 18. Accordion folds 18 may be angles (i.e. straight line folds, or curves, wavy etc.). The well may collapse upwards will occur when the bottom is pushed up, and the well may be turned “inside out”. In other embodiments, the well sides may be formed with an intended weak point or weak points to facilitate the collapse upwards of the well (or again, its turning inside out).

(145) As shown in FIG. 17 and the enlarged view in FIG. 19, the well 2 can have a portion 19 at the edge (or the rim, perimeter, rim or circumference) (or the edge in a particular geography of the well, i.e. not the entire perimeter (or rim, or circumference)) shaped to provide a film formed therein with a thickness that is more than 10% thicker than the center of the film or than the film's average thickness as described earlier.

(146) The well or mold material must be able to withstand drying temperatures of the drying process, without substantially deviating from its intended shape.

(147) In certain embodiments, the mold or well is formed using mechanical tools (including without limitation, dies or stamps) as part of the continuous production process. For example, the process may begin with a suitable, flexible rollstock in which the required wells are formed by a die tooling, such formation occurring prior to the deposit step in production.

(148) The well or mold may be thermoformed, cold-formed, thermo-cold-formed, or formed using any other known process. Where the well or mold is thermoformed or otherwise heated in connection with in-line formation, it may be desirable to chill or cool the well or mold prior to the film deposit stage.

(149) The well or mold may take various forms and shapes, typically configured to receive a single dose. However, in certain embodiments, the well or mold may accommodate a plurality of doses.

(150) The outer rim of the well or mold may rise at a gentle (acute) angle from the bottom of the well or mold (the “side angle”). The use of a gentle (acute) angle may permit the use of substrate materials for which more severe angles (for example, right angles or tending towards 90 degrees) overly stress the substrate material. For example, as shown in FIG. 19, the side angle α of the well is preferably acute, more preferably less than 60 degrees, still more preferably less than 45 degrees, most preferably less than 30 degrees. Comparable curves may be employed.

(151) The use of gentle side angles may permit more ready use of substrate materials to form the well that are more prone to stress fracture when formed into severe angles. For example, metal or substantially metal foils, such as aluminum may have this issue.

(152) In certain embodiments, the well or mold is sufficiently flexible and shallow enough to allow for the well or mold, after deposit, drying, and application of top sheet, to be rolled onto itself after drying. In other embodiments, the wells or molds or cut in blocks and stacked after application of the top sheet.

(153) In most embodiments, the area of the mold or well defines the dimensions of the film. The mold or well is of fixed size. Generally, the mold or well with have a deposit surface of 2 square inches or less, preferably 1.5 square inches or less. Larger size are possible but smaller sizes are preferred for comfort (in oral use), as well as to speed flow of the film composition to ultimate dimensions (i.e. a shorter distance to travel).

(154) In certain embodiments, the molds or wells are fixed and the dried films are removed from said molds or wells which can then be reused.

(155) In some embodiments, the well may have an annular shape such that the film forming composition is not deposited in the center of the well but around the center to create a dried film shape with a hole or multiple holes. In one embodiment, the film is in the shape of a circle with a hole in the center, akin to a doughnut.

(156) In certain embodiments, the well or mold is made of metal foil, e.g., aluminum foil, or plastics, and combinations. Suitable materials may include, without limitation, polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), polyester (PET), polystyrene, MYLAR-PET, Copolyesters, Polyvinylidene chloride (PVDC), Polychlorotrifluoro ethylene (PCTFE), cyclic olefin copolymers (COC) or polymers (COP), monomer polyethylene (LDPE or HDPE), Ethylene vinyl alcohol (EVOH), Aclar, paper aluminum combinations, paper/PET/aluminum laminates, and other aluminum based laminates.

(157) It some embodiments, a substrate may be inserted (an insert) into the bottom of the well, after well formation and prior to deposit of the film materials. Generally, the insert is hydrophobic. The insert however may not necessarily be uniform in properties; for example the insert may be hydrophobic in certain geographies, have non-uniform surface and other attributes intended to help shape the film, and otherwise release the film. The insert may be free-floating or adhered to the surface of the well.

(158) Heating the Well in Connection with Drying

(159) The use of the well or mold is applies in this case with novelty insofar as the well is used (in most embodiments) in film formation (when film is deposited on the well as a substrate), film drying and final primary packaging.

(160) As a result, in most embodiments, the well material used must be capable of withstanding heat exposure associated with the drying method selected.

(161) Softening of the well material (or components of the well material in the case of laminate or other multi-layer material) may be experienced where the well material approaches (meets or exceeds) its softening point or melting point.

(162) Softening of the well material may be addressed by having the well 2 contained in a rigid sub-well 16 on the conveyor as shown, e.g., in FIG. 13, in a shape substantially mated or otherwise adapted to the well 2. The sub-well 16 will typically be larger than the well 2, in order to accommodate the well 2. In certain embodiments, the sub-well shape mirrors the shape of the well so that the well 2 can be supported when and if the well softens due to temperature.

(163) The sub-well provides support for a well or mold that is softening from heat. The sub-well on the conveyor may be chilled or otherwise temperature controlled, either prior to entering the drier or while moving through the dryer. Softening is generally acceptable provided that substantially no (or no) leaching occurs, or no leaching of an unacceptable impurity occurs, and provided the final well shape is as intended.

(164) In certain embodiments, the sub-well is chilled, prior to deposit, to 15 C or below, to 12.5 C or below, or to 10 C or below. In certain embodiments, the sub-well is chilled to maintain a temperature of at least 10 C below the temperature of air currents in the oven, at least 20 C below the temperature of air currents in the oven, at least 30 C below the temperature of air currents in the oven, or at least 4 0 C below the temperature of air currents in the oven.

(165) The sub-well may also be heated. In some embodiments, the sub-well comprises a heating element. On other embodiments, the sub-well is heated, including without limitation by hot air currents, prior to deposit of the film solution, or after deposit and prior to entering the drier.

(166) The Drying Process Typically, the film is dried in the well or mold. Drying can occur with little consideration to migration of drug, unlike traditional film wet casting. One consideration relates to enabling suitable mixing of the drug (in embodiments where the drug is separately administered from the film forming composition) into the film matrix.

(167) Some consideration may be directed to ultimate release properties of the film.

(168) Consideration is given to speed, energy use and efficiency of drying, sufficient evacuation of solvent, and minimizing visible imperfections on the film.

(169) Another important distinction, is drying time. In conventional wet casting, the aim is to rapidly dry the film to prevent migration of the active. For example, US '277 claim 1 describes “rapidly increasing the viscosity of said polymer matrix upon initiation of drying within about the first 4 minutes to maintain said uniform distribution of said pharmaceutical active by locking-in or substantially preventing migration of said pharmaceutical active.”

(170) Because the present invention meters the desired drug loading, there is no concern for agglomeration of drug from a content uniformity perspective. This allows for longer drying times. Such longer drying times can serve a variety of purposes, and can be particularly useful in connection thicker films or for actives that are particularly heat sensitive.

(171) For certain actives, it may be desirable to allow the film to dry at ambient conditions, or even controlled, chilled conditions. This may be particularly desirable for heat-labile materials or other heat-sensitive active materials such as biologics including antibodies, antigens, vaccines, proteins, peptides and enzymes.

(172) The solvent or solvents may be partially, substantially or entirely lyophilized.

(173) At the same time, more rapid drying times can be effected as compared with traditional casting, without concern for disruptions to the top of the film surface.

(174) Since cast film requires viscosity rapidly for uniformity of dosage, specific drying is described, oriented towards early bottom drying to prevent volatile release of solvent and disruption of uniformity. On the other hand, the system herein described does not have that requirement and hence simplified top drying, not limited to air, infrared etc. is very workable.

(175) High levels of convection (i.e. airflow) may be desired to maximize heating while the actual air temperature is below the melting temperature of the well material (or well material components). Temperature ranges may be selected to balance sensitivity of the active component with requirements for rapid throughput. For typical pharmaceutical chemicals a drying range from 50 C to 225 C is preferred, with a range from 75-175 C more preferred and a range from 100-150 C most preferred. For biological active ingredients, temperatures from 30-100 C are preferred with a temperature range from 40-80 more preferred and a range from 50-70 most preferred

(176) In certain embodiments, the air temperature in the oven is at least 40% below the melting temperature of the well material, preferably at least 25% below the melting temperature of the well material, or more preferably at least 10% below the melting temperature of the well material. The air temperature may be 40%-15% below the melting temperature of the well material, preferably 40%-30% below the melting temperature or the well material, most preferably 25% to 15% below the melting temperature of the well material.

(177) In other embodiments, the melting temperature of the well material may be exceeded, principally for short durations. In other embodiments, the air temperature may be between the softening point and melting point of the well material.

(178) Convection speeds, and the direction of air flow must be selected so as not to disrupt the film's positioning in the well (bluntly, the air flow cannot literally blow deposited solution or the film out of the well or wells). In certain embodiments, air flow is 20 m/s or greater, 30 m/s or greater, or 40 m/s or greater. Air flow may be directed down directly onto the film the hold the film in place, or directed to the sides of the oven to create a circulatory or air convection effect. What is critical to understand is that the film is not part of a larger film web, as in casting, and so in theory may be dislodged, depending on the strength of adhesion of the film, and aerodynamics associated with the well. But at the same, time, there is greater flexibility in drying because migration of drug in the web is eliminated as an issue.

(179) Infrared, microwave, sonic, ultrasonic and other known methods of drying may be employed, either alone or in combination with other methods, including air drying. Such combination approaches may afford more efficient drying cycles, including reduced temperature, lower heat exposure time, and improved energy efficiency. The sub-well(s) may be heated and may comprise a heater.

(180) Taste Masking

(181) All currently known (and future) methods of taste masking may be employed, including flavors, sweeteners, bitter masking agents, coated particles, ion exchange resins and other methods. A significant advantage of the present method is that the drug residence time can be minimized.

(182) For example, where the drug is deposited separately from the film former, the drug can be completely without solvent. As a non-limitative example, drug in an ion exchange complex can be metered into the well, or coated drug particles. This means that the only exposure to water (or other solvent) in the film forming process is the brief period when the drug is mixed with the film former composition until the solvent is dried.

(183) Preferably, taste masked particles have a particle size with a diameter no greater than the dried height of the film itself. Consideration may also be given to mouthfeel. Preferably for mouthfeel particle size is below 300 microns, preferably below 200 microns most preferably below 100 microns.

(184) It is noted that the deposit method of making films taught herein offers a particular advantage for taste masking, namely, the ability to minimize the time that controlled release drug particles (or complexes) are subject to a solvent.

(185) In the method where the drug active is deposited separately from the film former composition, the drug particles (or complexes) are exposed to the solvent used to hydrate the film former for the very brief period between deposit of the drug particles (or complexes) and the time it takes to substantially remove the solvent by drying. This can have also advantages even where neat drug is used (e.g. to avoid a drug from partially solubilizing in the solvent and then crystallizing).

(186) Accordingly, total residence time of the drug with liquid solvent may be less than fifteen minutes, preferably less than ten minutes, more preferably less than five minutes, and most preferably less than two minutes. Such low residence times are also of utility with taste masked or controlled release drug particles or complexes.

(187) Controlled Release

(188) The term “controlled release” is intended to mean the release of active at a pre-selected or desired rate. This rate will vary depending upon the application. Desirable rates include fast or immediate release profiles as well as delayed, sustained or sequential release. Combinations of release patterns, such as initial spiked release followed by lower levels of sustained release of active are contemplated. Pulsed drug releases are also contemplated. A non limiting example would be where immediate acting drug is separately deposited together with or separate from the film former and a second or third deposit of drug with a differing release pattern is added.

(189) In another embodiment, controlled release active is deposited in one part of the film, and immediate release active is deposited in another (or they may be mixed together). Such embodiments may be combined with shapes that have varying degrees of thickness, or two joined sections (like the shapes discussed in connection with film scoring), or any other shapes disclosed herein.

(190) Scoring, or partial scoring (weak tear points, with holes and/or reduced thickness) can be employed to ease dose titration, among other reasons.

(191) The polymers that are chosen for the films of the present invention may also be chosen to allow for controlled disintegration of the active. This may be achieved by providing a substantially water insoluble film that incorporates an active that will be released from the film over time. This may be accomplished by incorporating a variety of different soluble or insoluble polymers and may also include biodegradable polymers in combination. Alternatively, coated controlled release active particles may be incorporated into a readily soluble film matrix to achieve the controlled release property of the active inside the digestive system upon consumption.

(192) Films that provide a controlled release of the active are particularly useful for buccal, gingival, sublingual and vaginal applications. The films of the present invention are particularly useful where mucosal membranes or mucosal fluid is present due to their ability to readily wet and adhere to these areas. In addition, this invention would allow for a barrier layer to be metered in the well at some time after the initial well contents have solidified, thus making a buccal/barrier product. Such barrier layer (soluble or insoluble) may also be deposited first in certain embodiments.

(193) The convenience of administering a single dose of a medication which releases active ingredients in a controlled fashion over an extended period of time as opposed to the administration of a number of single doses at regular intervals has long been recognized in the pharmaceutical arts. The advantage to the patient and clinician in having consistent and uniform blood levels of medication over an extended period of time are likewise recognized. The advantages of a variety of sustained release dosage forms are well known. However, the preparation of a film that provides the controlled release of an active has advantages in addition to those well-known for controlled release tablets. For example, thin films are difficult to inadvertently aspirate and provide an increased patient compliance because they need not be swallowed like a tablet. Moreover, certain embodiments of the inventive films are designed to adhere to the buccal cavity and tongue, where they controllably dissolve. Furthermore, thin films may not be crushed in the manner of controlled release tablets which is a problem leading to abuse of drugs such as Oxycontin. Furthermore, as mentioned the sequential numbering of the unit dose wells allows for identification of a source of the abusive drugs, providing the pharmacist notes the identification indicia during dispensing.

(194) The actives employed in the present invention may be incorporated into the film compositions of the present invention in a controlled release form. For example, particles of drug may be coated with polymers such as ethyl cellulose or polymethacrylate, commercially available under brand names such as Aquacoat ECD and Eudragit E-100, respectively. Solutions of drug may also be absorbed on such polymer materials and incorporated into the inventive film compositions. Other components such as fats and waxes, as well as sweeteners and/or flavors may also be employed in such controlled release compositions.

(195) Film Thickness

(196) Films are typically understood to be up to 10 mils in thickness (final product as dried), and above ten mils the product is referred to in a sheet. For ease of reference, references herein to film are understood to apply film (sheet) both up to, and beyond 10 mils in thickness. Films of the present invention may be 1-200 mils, preferably 3-20 mils, most preferably 5 to 15 mils. Thickness may be augmented above the foregoing thicknesses, including without limitation, for dermal use of the end product.

(197) Guided Placement

(198) The mold or well becomes the bottom of the final package and only requires the guided placement of a top sheet which completes the package and the dose unit is merely cut or weakened from the dosage next to it. By guided placement is meant that markers, physical or printed align the top sheet so that cutting of the final unit dosage unit aligns readily with the cutter or perforator. In addition, full labeling requirements may be resident on the top sheet and bottom wells. In certain embodiments, the top sheet is not gang printed but rather corresponds to the well or well plurality representing a single carton. Guided placement may be achieved using a vision system.

(199) Content Uniformity

(200) The most substantial problem in cast films is the difficulty to have a uniform dosage in a film which is cast with the active diluted by a large number of film formers and other additives plus a time profile for casting plus the fact that true uniformity is never present in all parts of a cast film. Hence a cast film is dependent on the size of the film to meet FDA guidelines.

(201) Ideally, as we will see the film forming materials and the active should be deposited from a separate source and into a well of a fixed size.

(202) An aspect of the present invention is adequate mixing of the drug and film former composition, not from the perspective of uniform distribution of drug in the film, but rather adequately containing the dose of the drug within the final dried film matrix. This means that substantially all of the drug is contained within the film matrix in most embodiments, meaning the drug is substantially subsumed within the film. However, in certain embodiments, the drug will be deposited and remain on the top surface of the film, or remain on the bottom surface of the film. A polymeric binder may be used when the drug is deposited to ensure that it remains adhered to the film.

(203) Mechanical intervention (Absence of in Film Formation)

(204) Thematically, the Applicants teach low viscosity of the film former composition to form a film in the mold or well. This system teaches away from the high viscosities relied upon for content uniformity equilibrium in cast film.

(205) This patent teaches against the main fundamental of prior film art, namely, the use of high viscosity to prevent migration of the active and preserve uniformity of dose content. Instead, high viscosity here works contrary to the deposition of the film former's dispersion in the well. Accuracy of the active is instead preserved by the direct deposition into the well contains the film former.

(206) By mechanical intervention, we mean physical contact with the film composition to spread the film composition, e.g. a three roll coating apparatus, a doctor blade, or equivalent coating technique.

(207) The high viscosity (and high surface and interfacial tensions) of the prior art (see Watson reference to non-flowing solid/film), required mechanical intervention (via the coating apparatus) to apply as a film. The film compositions of the prior art simply lack the spreading or flow characteristics to make films deposited in wells.

(208) However, it is contemplated that non mechanical compressed air and/or vibration and/or brief ultrasound may be employed to encourage flow of the film composition into a film in the mold or well or surface active agents to reduce surface tension or substrates to reduce contact angle to promote wetting and spreading of film composition.

(209) In certain, limited embodiments of the present invention, mechanical intervention may be employed to spread the composition into a film within the well or mold.

(210) Printing/Embossing

(211) Once the film is dry, it is possible to print or emboss an identifier on the film dosage form. For printing, individual print heads are typically required. One advantage of the current invention is that printing can be targeted and calibrated in a precise location on the film. Also the well may have a chevron such that it leaves an imprint identity on the dried film.

(212) The print head is small enough to extend into the well in most embodiments; ie. the print head dimensions are smaller than the well dimensions. Typically, there is a bank of print heads. As with the feeder bank, the line may stutter for the print head bank. Alternatively, the identifier may be embossed, either by embossing the dried film, are embossing a logo into the dried film by a shape at the bottom of the well. Such embossment is uniquely possible with films made by deposit. In other embodiments, an inkjet (or other known method) sprays the identifier onto the film from over the planar surface of the top of the well.

(213) Multi-layer Films Multi layer films are possible with this methodology simply by addition depositions of actives, or additional film compositions in the manufacturing process. For example, a semi insoluble (or insoluble) backing layer may be separately deposited on a deposited film. This may be done after the first layer is dried, or where density and miscibility will permit separate deposit on non-dried layers, on a non-dried layer. Similarly, a special layer of micro-adhesive, permeation enhancers, or other excipients disclosed herein may be deposited separately where desired. A multi-layer film with the same active in each layer may be formed, where one layer has different properties or a carries a controlled release version of the same active. In other embodiments different layers may contain different drug actives.

(214) With films of the present invention, it is possible to make a multilayer film wherein one layer has a different shape from the other layer. For example, semi-soluble layer without drug might be a square and a drug containing film might be deposited on top that dries in a circle. Countless other permutations are possible, in which the shape of one layer is different from the shape of a second layer, in a multi-layer film. Divergence of shape can perform a variety of functions. For example, where there is a backing layer in a buccal film, it may be desired that the backing layer extends past the drug containing layer that is against the buccal mucosa.

(215) Covering the Mold or Well

(216) It is contemplated that the mold or well will be covered and sealed as part of a continuous manufacturing process. It is important then that consideration be given relative to ambient humidity prior to sealing the mold or well to avoid bringing excess moisture into the package. It may be desirable to cool the film containing well or mold, or use other method (compressed air, nitrogen or other gas) to reduce humidity prior to packaging.

(217) Various forms of guided placement may be employed to ensure alignment of the mold or well with the top covering. In other embodiments, guided placement is not needed, particularly where the top covering is gang printed.

(218) The top covering will typically be foil, aclar, or other suitable sheet like material with suitable barrier properties to ensure stability of the product for the intended area of use (see ICH global guidelines).

(219) The wells may be filled with nitrogen or other gas (other than ambient air) prior to sealing.

(220) The final package may be child resistant, meaning the well and topsheet primary package may be child resistant. Alternatively, the primary package may be placed in a child resistant outer container or package. In a crude embodiment, a flexible blister of films may be placed in a child resistant bottle, or placed in child resistant outer where the blister is anchored or attached to the child resistant outer.

(221) The molds or wells may be joined together in a group of packages or may be separated. Such separation may occur at the time of filling/deposit or later, i.e. after drying.

(222) The Dried Film Thematically, film formation by deposit presents much more flexibility than conventional wet casting. This is because in conventional wet casting, uniform distribution of active within the film is necessary so that when cut into final pieces the individual film doses will meet drug content label claims.

(223) In contrast, here the desired level of drug is accurately metered into the mold or well along with the film former composition. Drug migration or agglomeration is not really an issue.

(224) The dried film must have only minimal mechanical strength to allow it to be released from the mold or well. A given film formulation's propensity to elongation is acceptable. Tensile strength and elasticity may be minimal.

(225) The dried film must simply be strong enough for release and use by the consumer.

(226) Issues like surface mottle, or voids do not represent drug content defects, and so are judged on the basis of consumer acceptability.

(227) The dried film of the present invention preferably has less than 10% variability in height (measured from the thickest portion of the film to the thinnest portion, measured vertically). In certain embodiments, additional variability may be acceptable or preferred for a wedged or tapered shape.

(228) Preferably, substantially all of the drug is contained within the dried film matrix in most embodiments. However, in certain embodiments, the drug will be deposited and remain on the top surface of the film, or remain on the bottom surface of the film.

(229) Films made by deposit may comprise non-homogeneous liquid phases, such as emulsions, or loose gels exhibiting syneresis or liquid crystalline mesomorphic phases may also be made by deposit. Films made with such attributes may yield film with unusual visual appearance and textures. Such unusual textures may promote rapid disintegration and or rapid absorption of the drug actives contained therein.

(230) Moisture Levels

(231) In the case of wet cast films, there is an spoken adage: “the wetter the better.” What this means is that relatively high moisture content is associated with easy-to-process films, bearing in mind the mechanical properties required in wet casting, which includes rolling the dried film onto itself to form a roll after drying. As a practical matter, wet cast films that are commercially manufactured have a moisture level of 7-10%.

(232) By commercially manufactured, we mean a product made in a batch size of at least 100,000 doses. Films may be cast with lower moisture levels, but this is typically performed at bench scale, where the films are not rolled onto themselves but simply dried in an oven after casting (and left essentially flat on the substrate on which they were cast).

(233) Films of the deposit method may be dried to a lower moisture level, i.e. a solvent (typically water) content of less than 10%, preferably less than 5%, and even more preferable below 3%. It is possible to dry films of the deposit level to a moisture level of below 2%.

(234) Films of the deposit method, manufactured at commercial scale, may be dried to a solvent (typically water) content of 2-6%, or a higher range of 3-5%.

(235) These low moisture levels have applicability for improved shelf life duration, as well as for actives that are particularly sensitive to moisture levels, for example and without limitation, certain vaccines, certain proteins, and other active and bioactive substances.

(236) Film by deposit enables the manufacture of films with lower moisture content than commercial wet casting; film by deposit may also be used in rare instances to make films with higher moisture content than commercial wet cast films.

(237) It is not practicable in commercial wet cast films to exceed certain moisture levels because the “wet” dried film will tend to adhere to both surfaces when rolled onto itself. Excessive tack and stickiness make this impracticable.

(238) However, in film by deposit, in special cases where high moisture contents are desired, it is possible to “dry” the commercial manufactured film to 10% solvent (water) or greater, 12.5% or greater, 15% or greater, or even as much as 20% solvent (water), or greater. In film be deposit, moisture content may be 12.5% to 25%, or 15% to 20%. Such high moisture films may have moisture domains within the film. Some films will have a gel-like center. Such high moisture films may be single layer, or multilayer. Such films may have unique application where, for stability or bioavailability reasons, the active is intended to be dissolved in, or in close proximity or contact to moisture.

(239) The level of moisture in the film prior to sealing the blister well may be measured in-line within the well using a non-contact probe such as a near infrared (NIR) probe.

(240) Pre-Releasing the Film

(241) In some embodiments, it may be desirable to take steps to pre-release the film from the bottom of the mold or well (such pre-release may be in whole or in part). For example, a roller may be employed with a surface that promotes release of the film from the bottom of the mold or well. Multiple rollers may be employed to crinkle the well (or a plurality of wells), pushing the well up from its formed shape and thereby helping to release the film. The film package may be bent lengthwise, or sidewise. The wells may be bent and unbent by the rollers. For example, as shown in FIG. 14, a sheet 1 with a plurality of wells 2 containing the film, which may be a single layer film or, as shown in FIG. 14 by way of example only a multilayer film 12, 13, and top sheet or covering 17 is bent and unbent around rollers 18, 19 to promote release of the dried film. In some embodiments, there is a top and bottom roller (or one or more) simultaneously operating on the wells. One or more roller have protrusions, or a rough surface to facilitate release.

(242) Other methods may be employed to physically disturb the well to promote release of the dried film.

(243) This step may occur prior to, or after, the covering 17 is placed in top of the mold or the well. The purpose is to make it easier for the patient to remove the film from the mold or well for use. Vacuum may also be employed for this purpose.

(244) In other embodiments, the consumer pre-releases the film by pushing a convexity in the well into a concavity (where the well is formed with a convexity for this purpose). Other methods are discussed herein. Whereas typical blister wells have sharp angles of almost 90 degrees from the web axis, wells designed for deposition may have much shallower angles. Angles may be from 15-75 degrees or more preferably 30-60 degrees or most preferably 40-50 degrees. The angled wells allow the eversion of the well structure by pushing the well from below to change the well bottom from concave to convex, allowing the film to be easily removed from the convex well bottom. The well walls may also have convex or concave curvature to facilitate eversion.

(245) Mechanical Intervention to Release

(246) Occasionally, it may be desirable to employ a particular formulation that when combined with a certain well or mold material experiences substantial adhesion after drying, thereby creating a release issue.

(247) In such instances, it may be desirable to employ a mechanical intervention to assist in releasing the film, in whole or in part, from the well or mold surface. This can be performed using a blade, a scraper or analogous physical apparatus, suction, compressed air, or other method. Such intervention may be performed in conjunction with, and optionally contemporaneously with, the methods described above (Pre-Releasing the Film) and below (Release through Intentional Crystallization).

(248) Release through Intentional Crystallization

(249) One method to effect a release, or partial release, or easing of release is through an intentional crystallization of the film that manifests on the outer surfaces of the film. Typically, such crystallization would be avoided. However, where film is made by deposit, and is formed on the well as a substrate, it can be desirable to intentionally include one or more crystallization components that will crystallize, and physically push the film off (or partially off of) the bottom of the well. This can promote release of the film from the bottom of the well.

(250) Suitable crystallization components may include without limitation: erythritol, xylitol, mannitol, sucrose and citric acid.

(251) Suitable crystallization components may be included in effective amounts. Sample ranges (measured from dry weight of the film) include: 1-30% or more preferably 3-20% or most preferably 5-10%, or 5-15%.

(252) Storage to Promote Release

(253) With conventional wet cast film, the film is delaminated from the coating substrate prior to packaging. While it is sometimes possible to determine visually the “top” side of the film (i.e. the top side when it was dried), insofar as the film as been de-laminated from its coating substrate there is not a meaningful film top- and bottom with respect to the foil pouch the film is typically packaged into. In contrast, a film made by deposit in a well or mold clearly has an identifiable “bottom.” One method to promote release of the film is to store the film wells upside down in the carton and store cartons (e.g. when palletized) to maintain this same upside-down posture. This method may be particularly employed where the top sheet is not in contact with the dried film when the top sheet is first applied.

(254) The film is held upside for a certain duration prior to release, e.g. at least seven days, at least fourteen days, at least thirty days. In this way, upside storage can be validated for product release specifications. It is also possible to palletize the film with boxes pointed downwards, again to encourage release. Such palletization ensures that the product is facing downwards in distribution.

(255) Other methods may be used to effect release the film from the well substrate such as temperature cycling by subjecting the blisters to one or more alternating cycles of refrigeration or freezing followed by thawing to room temperature.

(256) Film-Forming Polymers

(257) The non limiting polymer may be water soluble, water swellable, water insoluble, or a combination of one or more either water soluble, water swellable or water insoluble polymers. These may include homopolymers or various molecular weights or co-polymers of varying fractions or different polymer units. The polymer may include cellulose or a cellulose derivative. Specific examples of useful water soluble polymers include, but are not limited to, pullulan, hydroxypropylmethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, polyvinyl pyrrolidone, carboxymethyl cellulose, polyvinyl alcohol, sodium alginate, polyethylene glycol, xanthan gum, tragacanth gum, guar gum, acacia gum, arabic gum, polyacrylic acid, methylmethacrylate copolymer, polyvinyl alcohol—polyethylene glycol copolymers, carboxyvinyl copolymers, starch, gelatin, pectin and combinations thereof. Specific examples of useful water insoluble polymers include, but are not limited to, ethyl cellulose, hydroxypropyl ethyl cellulose, cellulose acetate phthalate, hydroxypropyl methyl cellulose phthalate and combinations thereof.

(258) As used herein the phrase “water soluble polymer” and variants thereof refer to a polymer that is at least partially soluble in water, and desirably fully or predominantly soluble in water, or absorbs water. Polymers that absorb water are often referred to as being water swellable polymers. The materials useful with the present invention may be water soluble or water swellable at room temperature and other temperatures, such as temperatures exceeding room temperature. Moreover, the materials may be water soluble or water swellable at pressures less than atmospheric pressure. Desirably, the water-soluble polymers are water soluble or water swellable having at least 20 percent by weight water uptake. Water swellable polymers having a 25 or greater percent by weight water uptake are also useful. Films or dosage forms of the present invention formed from such water-soluble polymers are desirably sufficiently water soluble to be dissolvable upon contact with bodily fluids.

(259) Other polymers useful for incorporation into the films of the present invention include, but are not limited to, biodegradable polymers, copolymers, block polymers and combinations thereof. Among the known useful polymers or polymer classes which meet the above criteria are: poly(glycolic acid) (PGA), poly(lactic acid) (PLA), polydioxanoes, polyoxalates, poly(.alpha.-esters), polyanhydrides, polyacetates, polycaprolactones, poly(orthoesters), polyamino acids, polyaminocarbonates, polyurethanes, polycarbonates, polyamides, poly(alkyl cyanoacrylates), and mixtures and copolymers thereof. Additional useful polymers include, stereopolymers of L- and D-lactic acid, copolymers of bis(p-carboxyphenoxy)propane acid and sebacic acid, sebacic acid copolymers, copolymers of caprolactone, poly(lactic acid)/poly(glycolic acid)/polyethyleneglycol copolymers, copolymers of polyurethane and (poly(lactic acid), copolymers of polyurethane and poly(lactic acid), copolymers of .alpha.-amino acids, copolymers of .alpha.-amino acids and caproic acid, copolymers of .alpha.-benzyl glutamate and polyethylene glycol, copolymers of succinate and poly(glycols), polyphosphazene, polyhydroxy-alkanoates and mixtures thereof. Binary and ternary systems are contemplated.

(260) Other specific, but non limiting, polymers useful include those marketed under the Medisorb and Biodel trademarks. The Medisorb materials are marketed by the Dupont Company of Wilmington, Del. and are generically identified as a “lactide/glycolide co-polymer” containing “propanoic acid, 2-hydroxy-polymer with hydroxy-polymer with hydroxyacetic acid.” Four such polymers include lactide/glycolide 100 L, believed to be 100% lactide having a melting point within the range of 338°−347° F. (170°−175° C.); lactide/glycolide 100 L, believed to be 100% glycolide having a melting point within the range of 437°−455° F. (225°−235° C.); lactide/glycolide 85/15, believed to be 85% lactide and 15% glycolide with a melting point within the range of 338°−347° F. (170°−175° C.); and lactide/glycolide 50/50, believed to be a copolymer of 50% lactide and 50% glycolide with a melting point within the range of 338°−347° F. (170°−175° C.).

(261) The Biodel materials represent a family of various polyanhydrides which differ chemically.

(262) Generally, lower molecular weight polymer grades will be favored for certain embodiments of the present invention, as they will make lower viscosity film former compositions.

(263) Such lower molecular weight grades will generally disintegrate faster than higher molecular weight grades. Where longer disintegration times are desired, it may be desirable to include non-water-soluble polymers.

(264) Suitable Excipients

(265) Any suitable excipient known in the art may be using in compositions of the present invention. Apart from film formers, a non-limiting list includes, pH buffers, permeation enhancers, surfactants, viscosity reducing agents, wetting agents, de-gassing agents, gassing agents, flavors, bitter masking agents, plasticizers, anti-caking agents, co-solvents, antioxidants and any other known excipient.

(266) Excipients may be included in sufficient or effective amounts.

(267) As discussed above, excipients may be added with the film former composition, or the drug (where the two are deposited separately).

(268) Solvents

(269) The following is a non-limiting list of solvents that may be employed: water, ethanol, acetone, DMSO, isopropanol, glycerol, propylene glycol, polyethylene glycol, propylene carbonate, ethyl acetate, d-limonene.

(270) pH Buffers

(271) Buffering agents may be used to control pH (acidic or base), including without limitation, sodium bicarbonate, potassium bicarbonate, sodium carbonate, potassium carbonate, calcium carbonate, dipotassium phosphate, potassium citrate, sodium phosphate, Formic Acid/Sodium Formate, Hydrogen Chloride/Potassium Chloride, Hydrogen Chloride/Glycine, Hydrogen Chloride/Potassium Hydrogen Phthalate, Citric Acid/Sodium Citrate, Acetic Acid/Sodium Acetate, Citric Acid/Disodium Hydrogen Phosphate, Citric Acid/Trisodium Citrate Dihydrate, etc., and any other such buffer system.

(272) The buffer system may be designed to dynamically control the pH of the product taking into consideration the effect of saliva during use, i.e., a dynamic buffer system. Non limitative, examples of buffer systems to obtain a pH include dibasic sodium phosphate and monobasic sodium phosphate. Both are FDA accepted buffer materials used and listed in the inactive ingredients list.

(273) For example, for a pH of 7, the ratio of monobasic/dibasic can be 4.6/8.6; for a pH of 7.5 the ratio of monobasic/dibasic can be 1.9/11.9; and for a pH of 8.0 the ratio of monobasic/dibasic can be 0.6/13.4. These are mathematically calculated buffer numbers and will need to be adjusted according to the other ingredients added to the formula.

(274) They also need to be adjusted for the length of time designed for the dissolution of the dosage unit on the buccal mucosa since saliva can be of a pH of about 6.8 but as it is made in larger amounts in the mouth the pH of saliva can sometimes become more basic. Thus, this dynamic buffer range is adjusted in the dosage unit by the amount s of the buffer system since saliva is freshly renewable in the mouth. See Fuisz U.S. Patent Application Publication Nos. 2009/0098192 A1 and US 2011/0318390 A1 discussing dynamic buffering and incorporated herein by reference. The dynamic buffer systems of the present invention may be acidic or basic.

(275) Fillers

(276) Fillers may be useful to increase the percentage of solids in the formulation and reduce solvent requirement allowing for more rapid evaporation and faster throughput. Fillers may be soluble of insoluble. Non-limiting examples are polydextrose, maltodextrin, inulin, microcrystalline cellulose.

(277) Surfactants

(278) Surfactants may be useful in connection with the present invention to reduce surface tension. Reducing surface tension is helpful to promote flowability of the film composition (see Young Equation discussed above), and may also be useful to promote mixing of the film former composition with separately added drug.

(279) Non limiting surfactants may include non-ionic surfactants, like polyol esters (e.g. glycol or glycerol esters, sorbitan derivatives); polyoxyethylene esters (e.g. polyethylene glycol (the “PEGs”; and poloxamers. Common ionic surfactants include ethers of fatty alcohols.

(280) Any suitable surfactant may be employed.

(281) In the approach of Yang et al, too much surfactant will create a product with a contact angle that is too low (Young's Equation) for coating on the substrate. Here, the formulator will want to use more surfactant to decrease the contact angle and promote flowability.

(282) Permeation Enhancers

(283) The film made by deposit may comprise one or more penetration agents, i.e., a substance that enhances absorption through the mucosa, mucosal coating and epithelium (otherwise known (see U.S. Patent Application Publication No. 2006/0257463 A1, the content of which is incorporated herein by reference) as a “penetration enhancer” or “permeability enhancer”). The penetration agent may comprise but is not limited to polyethylene glycol (PEG), diethylene glycol monoethyl ether (Transcutol), 23-lauryl ether, aprotinin, azone, benzalkomin chloride, cetylperidium chloride, cetylmethylammonium bromide, dextran sulfate, lauric acid, lauric acid/propylene glycol, lysophosphatilcholine, menthol, methoxysalicylate, oleic acid, phosphaidylcholine, polyoxyethylene, polysorbate 80, sodium EDTA, sodium glycholated, sodium glycodeoxycholate, sodium lauryl sulfate, sodium salicylate, sodium taurocholate, sodium taurodeoxycholate, sulfoxides, and various alkyl glycosides or, as described in U.S. Patent Application Publication No. 2006/0257463, bile salts, such as sodium deoxycholate, sodium glycodeoxycholate, sodium taurocholate and sodium glycocholate, surfactants such as sodium lauryl sulfate, polysorbate 80, laureth-9, benzalkonium chloride, cetylpyridinium chloride and polyoxyethylene monoalkyl ethers such as the BRIJ® and MYRJ® series, benzoic acids, such as sodium salicylate and methoxy salicylate, fatty acids, such as lauric acid, oleic acid, undecanoic acid and methyl oleate, fatty alcohols, such as octanol and nonanol, laurocapram, the polyols, propylene glycol and glycerin, cyclodextrins, the sulfoxides, such as dimethyl sulfoxide and dodecyl methyl sulfoxide, dodecyl maltoside, tetradecyl maltoside, the terpenes, such as menthol, thymol and limonene, urea, chitosan and other natural and synthetic polymers. Preferably, the penetration agent is a polyol, e.g., polyethylene glycol (PEG), glycerin, maltitol, sorbitol etc. or diethylene glycol monoethyl ether (Transcutol)), d-α-Tocopheryl polyethylene glycol 1000 succinate (vitamin E-TPGS), Aprotinin, Ceramides, Decanoyl carnitine, Lauric acid, Lauroyl carnitine, Lysophosphatidylcholine, Poloxamer 407, Poloxamer F68.

(284) Preferably, the dried film composition may comprise 0.01% to 10% permeation enhancer by mass, more preferably 0.1% to 5%.

(285) Viscosity Reducing Agents

(286) Various agents may be employed to reduced viscosity. In particular and without limitation, hydrophobic salts may serve to reduce viscosity, which is of use in connection with the film former composition. Without limitation, the following agents have been found useful: arginine hydrochloride, sodium thiocyanate, ammonium thiocyanate, ammonium sulfate, ammonium chloride, calcium chloride, zinc chloride, or sodium acetate. The teaching of US 20150071925, hereby incorporated herein by reference as if fully stated. Organic esters may also be useful. See US 20150071925, hereby incorporated herein by reference as if fully stated.

(287) Effective amounts are used.

(288) Anti-Caking Agents

(289) Anti-Caking Agents are particularly useful where the drug active is added separately from the firm former composition in powder or particulate form.

(290) Moisture, pressure and temperature all adversely affect powdered and granulated products. These conditions can make products cake, lump, bridge, clog equipment and cause fib and performance problems. Anti-caking and Free-flow powder agents can improve the flow behavior and storage stability of a broad variety of food products.

(291) Silica derived materials are preferred.

(292) A non limitative list includes: tricalcium phosphate, powdered cellulose, magnesium stearate, sodium bicarbonate, sodium ferrocyanide, potassium ferrocyanide, calcium ferrocyanide, bone phosphate, sodium silicate, silicon dioxide, calcium silicate, magnesium trisilicate, talcum powder, sodium aluminosilicate, potassium aluminium silicate, calcium aluminosilicate, calcium carbonate, bentonite, aluminium silicate, stearic acid, and polydimethylsiloxane.

(293) Effective amounts are employed for reliable flow of powder/particulate.

(294) Pharmaceutical Actives (also referred to herein as active pharmaceutical ingredients or drugs)

(295) By the term pharmaceutical active agent, we mean a drug as described below. By pharmaceutical active agent composition, we mean any composition containing one or more pharmaceutical active agents. However, it is expressly contemplated that the compositions and methods taught herein are not limited to drugs but may include any active agent as more fully described below.

(296) The active agents that may be incorporated into the films of the present invention include, without limitation bioactive agents such as pharmaceutical active agents, vaccines, cosmetic active agents, drugs, medicaments, botanicals, antigens or allergens such as ragweed pollen, spores, microorganisms, plant actives, enzymes and vitamins, as well as other active agents such as seeds, mouthwash components, flavors, fragrances, preservatives, sweetening agents, colorants, spices, and combinations thereof. An active agent composition is a composition containing one or more of the active agents described herein.

(297) A wide variety of non-limiting medicaments, bioactive active substances and pharmaceutical compositions may be included in the dosage forms of the present invention.

(298) Examples of useful drugs include ace-inhibitors, antianginal drugs, anti-arrhythmias, anti-asthmatics, anti-cholesterolemics, analgesics, anesthetics, anti-convulsants, anti-depressants, anti-diabetic agents, anti-diarrhea preparations, antidotes, anti-histamines, anti-hypertensive drugs, anti-inflammatory agents, anti-lipid agents, anti-manics, anti-nauseants, anti-stroke agents, anti-thyroid preparations, anti-tumor drugs, anti-viral agents, acne drugs, alkaloids, amino acid preparations, anti-tussives, anti-uricemic drugs, anti-viral drugs, anabolic preparations, systemic and non-systemic anti-infective agents, anti-neoplastics, anti-parkinsonian agents, anti-rheumatic agents, appetite stimulants, biological response modifiers, blood modifiers, bone metabolism regulators, cardiovascular agents, central nervous system stimulates, cholinesterase inhibitors, contraceptives, decongestants, dietary supplements, dopamine receptor agonists, endometriosis management agents, enzymes, erectile dysfunction therapies, fertility agents, gastrointestinal agents, homeopathic remedies, hormones, hypercalcemia and hypocalcemia management agents, immunomodulators, immunosuppressives, migraine preparations, motion sickness treatments, muscle relaxants, obesity management agents, osteoporosis preparations, oxytocics, parasympatholytics, parasympathomimetics, prostaglandins, psychotherapeutic agents, respiratory agents, sedatives, smoking cessation aids, sympatholytics, tremor preparations, urinary tract agents, vasodilators, laxatives, antacids, ion exchange resins, anti-pyretics, appetite suppressants, expectorants, anti-anxiety agents, anti-ulcer agents, anti-inflammatory substances, coronary dilators, cerebral dilators, peripheral vasodilators, psycho-tropics, stimulants, anti-hypertensive drugs, vasoconstrictors, migraine treatments, antibiotics, tranquilizers, anti-psychotics, anti-tumor drugs, anti-coagulants, anti-thrombotic drugs, hypnotics, anti-emetics, anti-nauseants, anti-convulsants, neuromuscular drugs, hyper- and hypo-glycemic agents, thyroid and anti-thyroid preparations, diuretics, anti-spasmodics, uterine relaxants, anti-obesity drugs, erythropoietic drugs, anti-asthmatics, cough suppressants, mucolytics, DNA and genetic modifying drugs, and combinations thereof.

(299) Examples of medicating active ingredients contemplated for use in the present invention include antacids, H.sub.2-antagonists, and analgesics. For example, antacid dosages can be prepared using the ingredients calcium carbonate alone or in combination with magnesium hydroxide, and/or aluminum hydroxide. Moreover, antacids can be used in combination with H.sub.2-antagonists.

(300) Analgesics include opiates and opiate derivatives, such as oxycodone (available as Oxycontin®), ibuprofen, aspirin, acetaminophen, and combinations thereof that may optionally include caffeine.

(301) Other preferred drugs for other preferred active ingredients for use in the present invention include anti-diarrheals such as immodium AD, anti-histamines, anti-tussives, decongestants, vitamins, and breath fresheners. Common drugs used alone or in combination for colds, pain, fever, cough, congestion, runny nose and allergies, such as acetaminophen, chlorpheniramine maleate, dextromethorphan, pseudoephedrine HCl and diphenhydramine may be included in the film compositions of the present invention.

(302) Also contemplated for use herein are anxiolytics such as alprazolam (available as Xanax®); anti-psychotics such as clozopin (available as Clozaril®) and haloperidol (available as Haldol®); non-steroidal anti-inflammatories (NSAID's) such as dicyclofenacs (available as Voltaren®) and etodolac (available as Lodine®), anti-histamines such as loratadine (available as Claritin®), astemizole (available as Hismanal™), nabumetone (available as Relafen®), and Clemastine (available as Tavist®); anti-emetics such as granisetron hydrochloride (available as Kytril®) and nabilone (available as Cesamet™); bronchodilators such as Bentolin®, albuterol sulfate (available as Proventil®); anti-depressants such as fluoxetine hydrochloride (available as Prozac®), sertraline hydrochloride (available as Zoloft®), and paroxtine hydrochloride (available as Paxil®); anti-migraines such as Imigra®, ACE-inhibitors such as enalaprilat (available as Vasotec®), captopril (available as Capoten®) and lisinopril (available as Zestril®); anti-Alzheimer's agents, such as nicergoline; and Ca.sup.H-antagonists such as nifedipine (available as Procardia® and Adalat®), and verapamil hydrochloride (available as Calan®).

(303) Erectile dysfunction therapies include, but are not limited to, drugs for facilitating blood flow to the penis, and for effecting autonomic nervous activities, such as increasing parasympathetic (cholinergic) and decreasing sympathetic (adrenersic) activities. Useful non-limiting drugs include sildenafils, such as Viagra®, tadalafils, such as Cialis®, vardenafils, apomorphines, such as Uprima®, yohimbine hydrochlorides such as Aphrodyne®, and alprostadils such as Caverject®.

(304) The popular H.sub.2-antagonists which are contemplated for use in the present invention include cimetidine, ranitidine hydrochloride, famotidine, nizatidien, ebrotidine, mifentidine, roxatidine, pisatidine and aceroxatidine.

(305) Active antacid ingredients include, but are not limited to, the following: aluminum hydroxide, dihydroxyaluminum aminoacetate, aminoacetic acid, aluminum phosphate, dihydroxyaluminum sodium carbonate, bicarbonate, bismuth aluminate, bismuth carbonate, bismuth subcarbonate, bismuth subgallate, bismuth subnitrate, bismuth subsilysilate, calcium carbonate, calcium phosphate, citrate ion (acid or salt), amino acetic acid, hydrate magnesium aluminate sulfate, magaldrate, magnesium aluminosilicate, magnesium carbonate, magnesium glycinate, magnesium hydroxide, magnesium oxide, magnesium trisilicate, milk solids, aluminum mono-ordibasic calcium phosphate, tricalcium phosphate, potassium bicarbonate, sodium tartrate, sodium bicarbonate, magnesium aluminosilicates, tartaric acids and salts.

(306) The pharmaceutically active agents employed in the present invention may include allergens or antigens, such as, but not limited to, plant pollens from grasses, trees, or ragweed; animal danders, which are tiny scales shed from the skin and hair of cats and other furred animals; insects, such as house dust mites, bees, and wasps; and drugs, such as penicillin.

(307) Botanicals may be employed, including marijuana, tobacco and any derivative thereof, including tetrahydrocannabinol and cannabidiol). Nicotine salts may be employed. Such botanicals may or may not be approved for pharmaceutical use or otherwise understood to be pharmaceutically active.

(308) Active agents may include proteins such as, enzymes and antibodies or other biologics such as (and without limitation) live attenuated and inactive viruses or other antigenic material for use as vaccines or drug delivery agents or nucleotide-based vaccines consisting of DNA, RNA or plasmids

(309) An anti-oxidant may also be added to the film to prevent the degradation of an active, especially where the active is photosensitive.

(310) Cosmetic active agents may include breath freshening compounds like menthol, other flavors or fragrances, especially those used for oral hygiene, as well as actives used in dental and oral cleansing such as quaternary ammonium bases. The effect of flavors may be enhanced using flavor enhancers like tartaric acid, citric acid, vanillin, or the like. Anti-tartar agents for dental use may also be employed.

(311) Coloring Agents

(312) Also color additives can be used in preparing the films. Such color additives include food, drug and cosmetic colors (FD&C), drug and cosmetic colors (D&C), or external drug and cosmetic colors (Ext. D&C). These colors are dyes, their corresponding lakes, and certain natural and derived colorants. Lakes are dyes absorbed on aluminum hydroxide.

(313) Other examples of coloring agents include known azo dyes, organic or inorganic pigments, or coloring agents of natural origin. Inorganic pigments are preferred, such as the oxides or iron or titanium, these oxides, being added in concentrations ranging from about 0.001 to about 10%, and preferably about 0.5 to about 3%, based on the weight of all the components.

(314) Flavors Flavors may be chosen from natural and synthetic flavoring liquids. An illustrative list of such agents includes volatile oils, synthetic flavor oils, flavoring aromatics, oils, liquids, oleoresins or extracts derived from plants, leaves, flowers, fruits, stems and combinations thereof. A non-limiting representative list of examples includes mint oils, cocoa, and citrus oils such as lemon, orange, grape, lime and grapefruit and fruit essences including apple, pear, peach, grape, strawberry, raspberry, cherry, plum, pineapple, apricot or other fruit flavors.

(315) The films containing flavorings may be added to provide a hot or cold flavored drink or soup.

(316) These flavorings include, without limitation, tea and soup flavorings such as beef and chicken.

(317) Other useful flavorings include aldehydes and esters such as benzaldehyde (cherry, almond), citral i.e., alphacitral (lemon, lime), neral, i.e., beta-citral (lemon, lime), decanal (orange, lemon), aldehyde C-8 (citrus fruits), aldehyde C-9 (citrus fruits), aldehyde C-12 (citrus fruits), tolyl aldehyde (cherry, almond), 2,6-dimethyloctanol (green fruit), and 2-dodecenal (citrus, mandarin), combinations thereof and the like.

(318) The sweeteners may be chosen from the following non-limiting list: glucose (corn syrup), dextrose, invert sugar, fructose, and combinations thereof; saccharin and its various salts such as the sodium salt; dipeptide sweeteners such as aspartame; dihydrochalcone compounds, glycyrrhizin; Stevia Rebaudiana (Stevioside); chloro derivatives of sucrose such as sucralose; sugar alcohols such as sorbitol, mannitol, xylitol, isomalt and the like. Also contemplated are hydrogenated starch hydrolysates and the synthetic sweetener 3,6-dihydro-6-methyl-1-1-1,2,3-oxathiazin-4-one-2,2-dioxide, particularly the potassium salt (acesulfame-K), and sodium and calcium salts thereof, and natural intensive sweeteners, such as Lo Han Kuo. Other sweeteners may also be used. Sweeteners may be employed from 1% to 50%, preferably 10-35%, more preferably 20-30% of the composition (by weight or mass) Isomalt is particularly useful with certain embodiments of the present invention insofar as it resists crystallization when made with compositions suitable for forming films by the deposit methods taught herein. Moreover, isomalt is thermally and chemically stable with low hygroscopicity.

(319) When the active is combined with the polymer in the solvent, the type of matrix that is formed depends on the solubilities of the active and the polymer. If the active and/or polymer are soluble in the selected solvent, this may form a solution. However, if the components are not soluble, the matrix may be classified as an emulsion, a colloid, or a suspension.

(320) Transdermal Films

(321) In certain embodiments, the deposit method of the present invention may be used to make transdermal films. Since transdermal films are typically multilayer, different layers may be deposited in series, if necessary between drying intervals. Backing layers of materials not readily depositable may be inserted into the mold or well (including inter alia microneedles). The following patents, describing transdermal compositions, are incorporated by reference as if fully stated herein (including incorporations into such patents): U.S. Pat. No. 9,089,527 B2 (assigned to Lohmann); U.S. Pat. No. 8,696,637 (assigned to Lohmann); U.S. Pat. No. 6,117,448 (assigned to Lohmann); U.S. Pat. No. 5,820,876 (assigned to Lohmann). Obviously, different compositions, and different excipients are used in transdermal systems from oral soluble films and so the teaching of the incorporated patents is important for such embodiments.

EXAMPLES

(322) A number of template molds were made, 10 mil recess thick, and adhered to a Teflon sheet. The compositions are shown in Table 1A, and Table 2A and Table 3. Results after deposit and drying for the compositions of Table 1A and Table 2A, are found in Tables 1B and 2B, respectively.

(323) As the results in Table 1B demonstrate, the compositions described in Table 1A were generally too viscous and exhibited too much surface tension to adequately flow into a mold.

(324) A number of the examples of 2A successfully flowed into films, and certain examples demonstrated good embedding of solids. For example, sample D of Table 2A showed good embedding of calcium carbonate particulate, which was used as a “dummy” drug particulate. The flowability of these examples would preclude their ability to be coated using conventional wet casting techniques. Their very proclivity to flow would lead them to roll off the substrate in a conventional casting process.

(325) The compositions of Table 3 are non-aqueous. Sample NA4, comprising 29.7% PEO (300,000) and 70.3% PEG400 is a promising approach for a slow release film of the present invention. Applicants observed that a range of 20-40% PEO (300,000 mw and above), together with PEG 80 as a solvent may be an attractive formulation option where slow release is desired from a film made by the deposit method.

(326) Table 4 contains surface tension values.

(327) TABLE-US-00002 TABLE 1A Aqueous Evaluation Samples HPMC HPMC Sample ID Instagel Corn Starch K15M F50 HPC PVP PG PEG2000 1 1.45% 1.99% 2 9.15% 3 4.32% 6.81% 4.48% 8.16% 4 3.74% 5.79% 2.23% 6.83% 5 2.57% 1.05% 6   5% 7 1.25% 8 1.00% 9 1.86% 10 0.90%

(328) TABLE-US-00003 TABLE 1B Aqueous Evaluation Samples Post Thermal Treatment Sample ID Pass Fail Cause 1 x high contact angle on silicon mold, did not wet or spread, did not embed solids, does not disperse in water 2 x high contact angle on silicon mold, did not wet or spread, did not embed solids, does not disperse in water 3 x too viscous 4 x very viscous, produced thick film that did not disperse readily in water 5 x film very thin and brittle, poor wetting and spreading on substrate, strong adhesion to teflon substrate when dried 6 x too viscous 7 x film too brittle and too thin 8 x film too brittle and too thin 9 x too viscous to add to template 10  x too viscous to add to template

(329) TABLE-US-00004 TABLE 2A Aqueous PEO Film Former Compositions Sample ID PEO 100K PEO 300K PEO 900K PEG400 PG PS 20 Viscosity cps A 9.09% 18.18% B 10.58%  6.68% 331* C 10.59%  7.30% 366* D 10.69%  5.59% 306* E  4.76% F 6.52% 12.90% 1.65% G 5.71%  3.50%  2243-1261** H 5.79%  4.05% I 18.31%  7.44%  1846-1155** J 18.31%  8.80% K 12.38%  4.45% 413* L 10.53%  5.61% M  7.06% 1.77%  5.60% N 4.76%  653-468** O 3.67% 217* P 6.28% *Newtonian fluid viscosity **Non-Newtonian fluid viscosity range from 10 to 100 s.sup.−1

(330) TABLE-US-00005 TABLE 2B Aqueous PEO Film Former Post Thermal Treatment Evaluations Sample ID Pass Fail Cause A x films .2 mm think easily disperse in water B x good spreading and wetting, low viscosity C x good spreading and wetting, low viscosity D x film former added to calcium carbonate, good embedding of solids E x viscous, but good spreading and wetting, thin film easily disperses in water F x viscous, films .15 mm, easily disperse in water G x x viscous composition, can produce good thin film, readily dispersible in water H x x viscous composition, can produce good film, easily dispersible in water I x too viscous, thick film, not easily dispersible in water J x too viscous, thick film, not easily dispersible in water K x good spreading and wetting, low viscosity L x good spreading and wetting, low viscosity M x good spreading and wetting, low viscosity N x produced film with good dissolution in water O x produced thin film with good dissolution in water P x produced thin film easily dispersible in water

(331) TABLE-US-00006 TABLE 3 Non-Aqueous PEO Compositions Post Thermal Treatment 90° C. Sample ID PEO100K PEO300K PEG400 Pass Fail Cause NA1 8.88% 91.12% x lacks cohesion, waxy dispersion NA2 9.51% 90.49% x lacks cohesion, waxy dispersion NA3 10.22% 89.78% x weak, wet, thick (1.23 mm) and fragile film; poor dissoution in water NA4 29.70% 70.30% x x viscous dispersion, poor flowability, opaque thick (1.6 mm) strong film; slow dissolution in water, tacky vehicle when wet

(332) TABLE-US-00007 TABLE 4 Examples of Surface Tension Values Temp □ ° C. mN/m Water 25 71.97 40 69.56 80 62.6 PEG200 20 43.5 ISP 25 23

Example AA

(333) The film of Example AA is a relatively slow-dissolving film, i.e. more than 10 minutes in the oral cavity of a user to dissolve.

(334) The table below sets forth the ingredients of the film of Example AA.

(335) TABLE-US-00008 Ingredients % Amount Klucel LF 18 4.5 PEO N 10 2.5 0.625 Natrosol 250 L 50.075 12.51875 PVA 2.5 0.625 Carbopol 934P 0.5 0.125 Magnasweet 0.3 0.075 Sucralose 0.75 0.1875 Sodium Benzoate 0.375 0.09375 Total: 100 25 % Solids 20 20 Total weight 500 125 Water Amt 400 100

(336) Klucel LF is hydroxypropylcellulose; PEO N 10 is polyethylene oxide, polyox WSR N 10; Natrosol 250 L is hydroxyethylcellulose, natrosol 250 L; Kollicoat Protect is polyethylene glycol polyvinyl alcohol copolymer; PVA is polyvinyl alcohol; Carbopol 934P is carbomer, Carbopol 934P; Magnasweet is monoammonium glycyrrhizinate, Magnasweet MM 100.

(337) The above composition was mixed and made into several circular-shaped films by deposit. The films were flexible and non-tacky. They were thin, strong (good tensile strength) and appeared to be well suited for their intended application. They were easily removable from the carrier strips without breakage and held up well to handling. The films appeared to be a composite of several liquid phases, solids, and aeration.

(338) The films were examined under both transmitted and dark field surface illumination with cross polarizers. There was evidence of liquid crystalline mesomorphic phases and this phase appeared to be distributed throughout the film. Further, it appeared that interfaces within the film are coated. Under some conditions, these phases could promote rapid oromucosal absorption of drugs incorporated therein.

(339) With transmitted light, again under cross polarization, the dispersed particles appeared to be covered with a thick coating. This also appeared to be true at interfaces in general within the film samples

(340) Examination of the liquid formulation used to make the films, after it was allowed to sit, showed physical separation with at least two phases. One appeared to be an opaque gel-like substance surrounded by a liquid phase which appears to be of lower viscosity. This appears to be due to a syneresis effect.