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A medicament delivery device for administering a medicament to a user includes a medicament reservoir and an entrance port and an exit port and a gas chamber disposed adjacent the entrance port. The device includes a pressurizing mechanism to pressurize the gas chamber. The device also contains fran

A medicament delivery device for administering a medicament to a user includes a medicament reservoir and an entrance port and an exit port and a gas chamber disposed adjacent the entrance port. The device includes a pressurizing mechanism to pressurize the gas chamber. The device also contains frangible membranes and may include a piercing member. In use, the frangible membranes in the device are responsive to pressure in the gas chamber and are either pierced or burst to allow gas to flow through the entrance port and the reservoir and to carry the medicament through the exit port.

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That which is claimed is: 1. A medicament delivery device for administering an inhalable medicament to a user, said device comprising: a medicament reservoir; an entrance port and an exit port each disposed adjacent said reservoir; a gas chamber disposed adjacent said entrance port; a pressurizing

That which is claimed is: 1. A medicament delivery device for administering an inhalable medicament to a user, said device comprising: a medicament reservoir; an entrance port and an exit port each disposed adjacent said reservoir; a gas chamber disposed adjacent said entrance port; a pressurizing mechanism operable to pressurize said gas chamber to at least a prescribed pressure; a first frangible membrane extending across said entrance port and separating said reservoir from said gas chamber; a second frangible membrane extending across said exit port; a tube disposed adjacent said exit port and defining a delivery opening opposite said exit port; and, a piercing member configured to initially engage said first membrane on a surface of said first membrane facing said reservoir; wherein, when said pressurizing mechanism is actuated, said piercing member engages and disrupts said first membrane to allow gas to flow through said first membrane and said entrance port and said reservoir and to carry the medicament through said exit port into said tube. 2. The medicament delivery device of claim 1 wherein said delivery opening of said tube is placed adjacent a facial opening of the user. 3. The medicament delivery device of claim 2 wherein said delivery opening of said tube is placed adjacent a nose of the user. 4. The medicament delivery device of claim 2 wherein said delivery opening of said tube is placed adjacent a mouth of the user. 5. The medicament delivery device of claim 1 including a medicament disposed in said reservoir. 6. The medicament delivery device of claim 5 wherein said medicament is a dry powder. 7. A medicament delivery device for administering an inhalable medicament to a user, said device comprising: a medicament reservoir; an entrance port and an exit port each disposed adjacent said reservoir; a gas chamber disposed adjacent said entrance port; a pressurizing mechanism defining said gas chamber and operable to pressurize said gas chamber to at least a prescribed pressure; a first frangible membrane extending across said entrance port and separating said reservoir from said gas chamber, said first frangible membrane having a weakening embossment formed on a surface of said first membrane; a second frangible membrane extending across said exit port said second frangible membrane having a weakening embossment formed on a surface of said second membrane; a tube disposed adjacent said exit port and defining a delivery opening opposite said exit port; wherein, when said pressurizing mechanism is actuated, said first membrane is distorted and first membrane is disrupted to allow gas to flow through said first membrane and said entrance port and said reservoir and to carry the medicament through said exit port. 8. The medicament delivery device of claim 7 including a piercing member configured to initially engage said first membrane on a surface of said first membrane facing said reservoir. 9. The medicament delivery device of claim 8 including a piercing member, said piercing member being responsive to said pressurizing mechanism wherein, when said pressurizing mechanism is actuated, said piercing member engages and disrupts said first membrane in said gas chamber to allow gas to flow through said first membrane and said entrance port and said reservoir and to carry the medicament through said exit port. 10. The medicament delivery device of claim 7 including a removable end cap configured to rupture said second membrane upon removal of said end cap from said medicament delivery device. 11. The medicament delivery device of claim 7 wherein said delivery opening of said tube is placed adjacent a facial opening of the user. 12. The medicament delivery device of claim 11 wherein said delivery opening of said tube is placed adjacent a nose of the user. 13. The medicament delivery device of claim 11 wherein said delivery opening of said tube is placed adjacent a mouth of the user. 14. The medicament delivery device of claim 7 including a medicament disposed in said reservoir. 15. The medicament delivery device of claim 14 wherein said medicament is a dry powder.