System for the Transdermal Delivery of Active Ingredient

Abstract

The invention relates to a transdermal therapeutic system (TTS) for delivering pharmaceutical active ingredients. The TTS includes a cover layer and at least one active-ingredient-containing carrier material. At least one retaining element is located between the active-ingredient-containing carrier material and the cover layer, with the retaining element fixing the active-ingredient-containing carrier material onto the cover layer. The invention further relates to a method for fastening an active-ingredient-containing carrier material to a cover layer of a TTS in the presence of hook-and-loop strip segments and the use of a hook-and-loop strip in transdermal or iontophoretic administration of pharmaceutical or therapeutic active ingredients to patients.

Claims

1. A transdermal therapeutic system (TTS) for the delivery of therapeutic actives, comprising a backing layer, at least one releasably secured active-containing carrier material, and one or more electrodes; wherein the active-containing carrier material is releasably secured to the backing layer by one or more retaining elements, and wherein the one or more electrodes are present between the active-containing carrier material and the backing layer such that the active-containing carrier material entirely covers said electrode.

2. The TTS as claimed in claim 1, wherein the therapeutic actives have a cationic structure and the carrier material is liquid saturated.

3. The TTS as claimed in claim 1, wherein the one or more retaining elements is configured as an elongately shaped segment of a hook and loop tape whereby the active-containing carrier material assumes the function of the loop side of said hook and loop tape.

4. The TTS as claimed in claim 3, wherein the elongately shaped hook and loop tape shape matches the active-containing carrier material shape.

5. The TTS as claimed in claim 1, wherein the TTS is attached to skin via a pressure-sensitive adhesive overplaster or via a uniform or patterned pressure-sensitive adhesive implementation of that side of the backing layer which faces the skin, wherein said active-containing carrier material is free from pressure-sensitive adhesive.

6. The TTS as claimed in claim 1, wherein the backing layer is an occlusive backing layer which is a barrier layer for liquids and water vapor.

7. The TTS as claimed in claim 6, wherein the occlusive backing layer consists of a self-supported plastic film and has a thickness in the range from 5 to 300 m.

8. The TTS as claimed in claim 7, wherein the plastic film is polyethylene or polypropylene or polyester or polyurethane or polyamide and has a thickness in the range from 10 to 200 m.

9. The TTS as claimed in claim 7, wherein the plastic film has a thickness in the range from 12 to 150 m.

10. The TTS as claimed in claim 1, wherein the active-containing carrier material has a round or oval shape and the elongately shaped hook and loop tape has an arcuate circular segment shape with a radius corresponding to the radius of the round or oval liquid-saturated carrier material.

11. The TTS as claimed in claim 1, wherein the elongately shaped hook and loop tape has a width that may vary, and the hook and loop tape does not cover an entire area of the backing layer whereover the active-containing carrier material in the TTS extends.

12. The TTS as claimed in claim 11, wherein the elongately shaped hook and loop tape covers only a or one part of the area.

13. The TTS as claimed in claim 11, wherein said TTS comprises two or more hook and loop tapes arranged on opposite sides of the area wherover the active-containing carrier material in the TTS extends.

14. The TTS as claimed in claim 1, wherein the active-containing carrier material is a liquid-saturated carrier material, wherein the carrier material is a fibrous nonwoven web, a textile material, a woven fabric, a knitted fabric not produced by weft knitting with independently-movable needles, a sponge-shaped material, a sponge cloth or a gel-forming polymer.

15. A method for transdermal or iontophoretic administration of therapeutic actives to patients in need of treatment with such actives comprising administering a TTS that includes a hook and loop tape to attach an active-containing liquid-saturated carrier material to an occlusive backing layer, wherein said therapeutic actives have a cationic structure with amino or imino groups in their molecule.

16. The method as claimed in claim 15 for the transdermal iontophoretic administration of analgesics, antiemetics or other central nervous system drugs or peptides.

17. The method as claimed in claim 15, wherein the active-containing carrier material is a liquid-saturated carrier material which serves as a matrix or reservoir wherefrom the therapeutic actives are delivered to the skin and then pass through the skin either passively or with iontophoretic augmentation.

18. The method as claimed in claim 15, wherein the analgesics are fentanyl or morphine, the antiemetic is granisetron, the other central nervous system drugs are rivastigmine or galantamine, and the peptides are peptide hormones or blood coagulation factors or growth hormones.

19. The method as claimed in claim 18, wherein the peptide hormones are insulin or oxytocin.

Description

EXAMPLE

[0090] The invention and its effectiveness will now be illustrated by way of example with reference to the accompanying drawings, where

[0091] FIG. 1 shows in schematic form an invention TTS from below, i.e., from the skin side;

[0092] FIG. 2 shows in schematic form an invention TTS from above, i.e., from the skin-remote side;

[0093] FIGS. 3a, 3b, 3c and 3d show in schematic form, in component steps, how the active-containing carrier material is removed from its separately stored package and secured to the backing layer of the TTS.

[0094] FIG. 1 shows at 1 the active-containing carrier material which has a round shape and which has already been brought into position on the left-hand area of the TTS, while a covering film 2 having an opening 3 on the right-hand side gives a view of the electrode 4, the electrical in-line 5 and four arcuately shaped hook and loop tapes 6a, 6b, 6c and 6d. A further active-containing carrier material 11 (not depicted in FIG. 1) is then, in the next step, pressed onto the hook and loop tapes 6a, 6b, 6c and 6d and firmly secured with the hook and loop tapes 6a, 6b, 6c and 6d so as to entirely cover the electrode 4.

[0095] FIG. 2 shows essentially the backing layer 7 wherethrough the current supplies 5 and 5 are visible at left and at right, respectively. The current supply unit 8 with battery and electronic controls can be seen in the center of the depiction.

[0096] FIG. 3a shows at the top the backing layer 7 whereon are disposed two hook and loop tape segments 6a and 6c and at the bottom the active-containing carrier material 11 lying in an upwardly opened package 10 opened by a closure film being peeled off beforehand (not depicted).

[0097] FIG. 3b shows how the active-containing carrier material 11 while still in the opened package 10 has been approximated together therewith to the backing layer 7 and the hook and loop tape segments 6a and 6c.

[0098] FIG. 3c shows how the active-containing carrier material 11 together with the package 10 is pressed from below in the arrow direction against the hook and loop tape segments 6a and 6c and against the backing layer 7.

[0099] FIG. 3d shows how the package 10 is removed downwardly while the active-containing carrier material 11 remains secured to the hook and loop tape segments 6a and 6c and hence to the backing layer 7.