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A hypodermic drug delivery apparatus for delivering a pressurized medication fluid generally incorporates a reservoir containing at least one deliverable fluid, a reservoir pressurizing device, a rupturing member, a fluid administration device for communicating with the reservoir via a fluid passage

A hypodermic drug delivery apparatus for delivering a pressurized medication fluid generally incorporates a reservoir containing at least one deliverable fluid, a reservoir pressurizing device, a rupturing member, a fluid administration device for communicating with the reservoir via a fluid passageway, and a rupture control mechanism for preventing rupture of a wall portion of the reservoir below a threshold pressure.

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1. A drug delivery apparatus for delivering pressurized fluid, comprising: a. at least one reservoir forming a sealed package for the fluid and comprising at least one rupturable wall portion;b. a reservoir pressurizing device for pressurizing said reservoir;c. at least one rupturing member for rupt

1. A drug delivery apparatus for delivering pressurized fluid, comprising: a. at least one reservoir forming a sealed package for the fluid and comprising at least one rupturable wall portion;b. a reservoir pressurizing device for pressurizing said reservoir;c. at least one rupturing member for rupturing said rupturable wall portion;d. at least one fluid administration device communicating with said reservoir via a fluid passageway;e. a rupture control mechanism preventing rupture of the wall portion below a threshold pressure, whereby: when the threshold pressure is reached, said wall portion may become ruptured by said rupturing member allowing the fluid to enter the fluid passageway and be delivered to a destination through said fluid administration device; andf. a pressure chamber for use in pressurizing said reservoir, said rupture control mechanism including a resistance mechanism for preventing pressurization of the reservoir before a requisite pressure has been established in said pressure chamber, wherein said resistance mechanism comprises a collapsible spring disposed in said pressure chamber in confronting relationship to said reservoir, said collapsible spring operative to permit gradual pressure build up in said pressure chamber and to thereafter collapse and cause an instantaneous pressure in said reservoir. 2. A drug delivery apparatus according to claim 1 wherein said fluid administration device is selected from a group consisting of one or more needles, one or more micro-needles, one or more needleless-injector orifices, a spray nozzle, a dispersion nozzle, and an aerosolizing nozzle. 3. A drug delivery apparatus according to claim 1 including a stopper disposed in said pouch for preventing said rupturing member from further damaging said reservoir as fluid is expelled therefrom. 4. A drug delivery apparatus according to claim 1 wherein said rupture control mechanism includes a resilient member for resisting displacement of said rupturable wall portion toward said rupturing member. 5. A drug delivery apparatus according to claim 1 further comprising a cover and a base, said rupturing member formed integrally with said base. 6. A drug delivery apparatus according to claim 1 wherein said rupture control mechanism comprises a movable plate biased toward the reservoir and movable away from and towards its biased position in response to pressure in the reservoir. 7. A drug delivery apparatus according to claim 1 wherein said administration device has a pointed end that is movably disposed relative to an exterior surface of said delivery device between a retracted position wherein said pointed end is located within said delivery device and an extended position wherein said pointed end projects exteriorly of said delivery device, said pointed end operative to move from the retracted position to the extended position when the threshold pressure is reached, thereby activating said delivery apparatus. 8. A drug delivery apparatus according to claim 1 further comprising a pressure release device allowing controlled release of excess pressure from said pressure chamber. 9. A drug delivery device according to claim 1 further comprising a reservoir pressurizing device utilizing a pressure source selected from a group consisting of an internal or external chemical reaction, a combustion reaction, a pump, a liquid pump, a gas pump, a foot pump, a manual pump, and a syringe pump. 10. A drug delivery apparatus according to claim 1 wherein said reservoir comprises a plurality of compartments. 11. A drug delivery device according to claim 10 wherein said compartments are mixed prior to rupturing of the reservoir. 12. A drug delivery device according to claim 10 wherein the contents of said compartments are delivered sequentially. 13. A drug delivery apparatus according to claim 1 comprising an activation key formed as a coupling member configured for common movement with said rupturing member, said coupling member biased away from said reservoir. 14. A drug delivery device according to claim 1 wherein said fluid administration device includes a fluid conduit that defines said fluid passageway, said delivery device further comprising a non-return valve for preventing back flow into said reservoir. 15. A drug delivery apparatus according to claim 1 wherein said administration device is biased toward the reservoir and is movable away from and towards its biased position, to and from an administration position, by the presence of sufficient pressure in the reservoir. 16. A drug delivery apparatus according to claim 1 wherein said rupturable wall comprises a sealing member which seals around the rupturing member upon rupture. 17. A drug delivery apparatus according to claim 1 including a deliverable ingredient that mixes with the fluid from the reservoir and is delivered with the fluid through the administration device. 18. A drug delivery apparatus for delivering pressurized fluid, comprising: a. at least one reservoir forming a sealed package for the fluid and comprising at least one rupturable wall portion;b. a reservoir pressurizing device for pressurizing said reservoir;c. at least one rupturing member for rupturing said rupturable wall portion;d. at least one fluid administration device communicating with said reservoir via a fluid passageway;e. a rupture control mechanism preventing rupture of the wall portion below a threshold pressure, whereby: when the threshold pressure is reached, said wall portion may become ruptured by said rupturing member allowing the fluid to enter the fluid passageway and be delivered to a destination through said fluid administration device; andf. an anti-abuse device to prevent extraction of fluid from the reservoir after administration has been completed. 19. A drug delivery apparatus for delivering pressurized fluid, comprising: a. at least one reservoir forming a sealed package for the fluid and comprising at least one rupturable wall portion;b. a reservoir pressurizing device for pressurizing said reservoir and operative to produce a pressure profile over time which controls timing of the reservoir's rupture;c. at least one rupturing member for rupturing said rupturable wall portion;d. at least one fluid administration device communicating with said reservoir via a fluid passageway; ande. a rupture control mechanism preventing rupture of the wall portion below a threshold pressure, whereby: when the threshold pressure is reached, said wall portion may become ruptured by said rupturing member allowing the fluid to enter the fluid passageway and be delivered to a destination through said fluid administration device.