Abstract:
Heating units, drug supply units and drug delivery articles capable of rapid heating are disclosed. Heating units (10, 60) comprising a substrate (12, 62) and a solid fuel (20, 80) capable of undergoing an exothermic metal oxidation reaction disposed within the substrate (12, 62) are disclosed. Drug supply units (100) and drug delivery articles (162) wherein a solid fuel (114, 174) is configured to heat a substrate (64, 164) to a temperature sufficient to rapidly thermally vaporize a drug (110, 166) disposed thereon are also disclosed.
Abstract:
A device for delivering a drug by inhalation is disclosed. The device includes a body defining an interior flow-through chamber having upstream and downstream chamber openings, and a drug supply unit contained within the chamber for producing, upon actuation, a heated drug vapor in a condensation region of the chamber. Gas drawn through the chamber region at a selected gas-flow rate is effective to form drug condensation particles from the drug vapor having a selected MMAD between 0.02 and 0.1 MMAD or between 1 and 3.5 gm. A gas-flow control valve disposed upstream of the unit functions to limit gas-flow rate through the condensation region to the selected gas-flow rate. An actuation switch in the device activates the drug-supply unit, such that the drug-supply unit can be controlled to produce vapor when the gas-flow rate through the chamber is at the selected flow rate.
Abstract:
Heating units, drug supply units and drug delivery articles capable of rapid heating are disclosed. Heating units (900) comprising a substrate (905) and a solid fuel capable of undergoing an exothermic metal oxidation reaction disposed within the substrate are disclosed. These heating units (900) can be actuated by electrical resistance or by optical ignition. Drug supply units and drug delivery articles wherein a solid fuel is configured to heat a substrate to a temperature sufficient to rapidly thermally vaporize a drug disposed thereon are also disclosed.