Medicament inhalation delivery devices and methods for using the same

A method for administering an inhalable medicament to a user, said method comprising the steps of:

• a) providing a medicament delivery device including:
• 1) a medicament reservoir;
• 2) an entrance port and an exit port each disposed adjacent the reservoir;
• 3) a gas chamber disposed adjacent the entrance port;
• 4) a pressurizing mechanism operable to pressurize the gas chamber to at least a prescribed pressure;
• 5) a piercing member responsive to said pressurizing mechanism;
• 6) a first frangible membrane extending across the entrance port and separating the reservoir from the gas chamber;
• and
• 7) a second frangible membrane extending across the exit port;
• and
• b) actuating the pressurizing mechanism to generate the prescribed pressure in the gas chamber, whereupon at least one of the first and second membranes is penetrated by said piercing member to allow gas to flow past at least one of said membranes and through the entrance port and the reservoir and to carry the medicament through the exit port.

A method for administering an inhalable medicament to a user, said method comprising the steps of:

• a) providing a medicament delivery device including:
• 1) a medicament reservoir;
• 2) an entrance port and an exit port each disposed adjacent the reservoir;
• 3) a compressible blister defining a gas chamber and operable to pressurize the gas chamber to at least a prescribed pressure;
• and
• 4) a frangible membrane extending across the entrance port and separating the reservoir from the gas chamber;
• 5) a piercing member responsive to said pressurizing mechanism;
• and
• b) compressing the blister to generate the prescribed pressure in the gas chamber, whereupon said piercing member engages and disrupts said frangible membrane to allow gas to flow past said membrane and through the entrance port and the reservoir and to carry the medicament through the exit port.