An aerosol provision device includes: a power source and control circuitry. The control circuitry is configured to cause the power source to supply electrical current in accordance with a set duty cycle to an aerosol generator so as to maintain a substantially constant average power, wherein the duty cycle is set dependent on the temperature of the aerosol generator; and wherein the control circuitry is configured to determine a voltage supplied by the power source.

An atomization component includes: a matrix; and a heating film. The matrix includes an atomization surface. The heating film is arranged on the atomization surface, and when energized, heats and atomizes an aerosol-generating substrate on the atomization surface. The heating film includes a metal heating layer and an inorganic protection layer that are stacked, the inorganic protection layer being arranged on a surface of the metal heating layer that is away from the matrix. The metal heating layer includes at least two sub-metal layers that are sequentially stacked. Any two adjacent sub-metal layers have different components.

A device is provided for the self-administration of cannabinoids. The device includes a container having an opening on a first end thereof, a cap which releasably engages said first end of said container, and an assembly, including first and second modules, which is removably placed inside of the container. The first module includes a first element equipped with first and second threading, a receptacle for said solid medium, said receptacle being equipped with at least one surface feature which slidingly engages said first threading, and a solid medium which is seated in said receptacle and which contains at least one cannabinoid. The second module is equipped with a filter and has a first threading disposed on a first terminal portion thereof. Various accessories may be releasably attached to the container or assembly. Methods of using the device are also described.

A therapeutic vaporizer inhalation bag attachment system with an integrated valve is disclosed. The attachment system includes a body having a lumen extending between the two openings of the body, a bag coupling, and a valve positioned within the lumen. A method of using the inhalation bag attachment system is also disclosed.

A vaporization device includes a first portion and a second portion. The first portion includes a first body defining a first interior volume, a first half of a split-pod, a second half of a split-pod, an opening, a first heating apparatus, and a second heating apparatus. The first half of the split-pod is configured to hold a nicotine-containing liquid. The second half of the split-pod is configured to hold a non-nicotine-containing liquid. The opening separates the first half from the second half of the split-pod. The first heating apparatus is dedicated to the first half. The second heating apparatus is dedicated to the second half. The second portion includes a second body defining a second interior volume and a computing system. The computing system is disposed within the second interior volume. The computing system is configured to vary an amount of current supplied to the first and second heating apparatuses.

A method of producing microparticles by spray drying comprises the steps of providing a spray-drying feedstock solution comprising water, a volatile divalent metal salt, weak acid, 5-15% dairy or vegetable protein (w/v) and 1-20% active agent (w/v). The feedstock solution is adjusted to have a pH at which the volatile divalent metal salt is substantially insoluble. The feedstock solution is then spray-dried at an elevated temperature to provide atomised droplets, whereby the volatile divalent metal salt disassociates at the elevated temperature to release divalent metal ions which crosslink and aggregate the protein in the atomised droplets to produce microparticles having a crosslinked aggregated protein matrix and active agent dispersed throughout the matrix.

Devices for delivering a controlled concentration of an agent are provided. The device includes a reservoir for the agent and a flow control portion operably connected to the reservoir. The device also includes a valve for releasing the agent from the flow control portion and a pump for flowing air to mix with the agent released by the valve and for flowing the agent and air mixture out of the device. Methods of delivering a vaporized agent to a subject are also provided. The methods include storing a liquid agent in a reservoir of a device and flowing the agent into a flow control chamber to change the agent to a gas. The methods also include mixing the agent in gas form with air and flowing the agent and air mixture out of the device to be delivered to a subject.

An electronic vapor provision system includes a vaporizer for vaporizing liquid for inhalation by a user of the electronic vapor provision system; a power supply for supplying power to the vaporizer to vaporize the liquid in response to a user activation of the device; and a control unit configured to estimate a user's expected activation duration and cause power to be supplied to the vaporizer for a period of time shorter than a user's activation duration.

A charging system for charging a vaporizer device is described. The charger may be adapted to control the output voltage to the vaporizer device, thus improving charging efficiency and reducing waste heat generation. Related systems, methods, and articles of manufacture are also described.

Cartridges for vaporizer devices are provided. In one exemplary embodiment, the cartridge can include a reservoir configured to contain a plurality of encapsulated particles and an airflow tube extending through the reservoir. Each of the plurality of encapsulated particles includes a core formed of a liquid vaporizable material and a coating material that forms a shell surrounding the core, in which the shells of the plurality of encapsulated particles are configured to be selectively ruptured to release the liquid vaporizable material therefrom. The airflow tube includes a wicking element that is in communication with the reservoir, in which the wicking element is configured to draw, into the airflow tube for vaporization, at least a portion of the liquid vaporizable material that is released by rupturing one or more shells of the plurality of encapsulated particles. Vaporizer devices are also provided.