Multipathway electronically-controlled drug delivery system

A method for automatic or on-demand delivery of a drug to a patient, said method comprising the steps of:

• a) providing a multipathway electronically-controlled drug delivery system comprising a drug storage and delivery module and a control means for activating the drug storage and delivery module to deliver a drug to a patient;
• b) forming within the drug storage and delivery module a generally hollow dual-chambered delivery pod having an enclosed top face and bottom face, and where the chambers are generally arranged as an upper chamber and a lower chamber;
• c) forming the upper chamber to function as a propellant chamber having a ceiling, a wall, and a collapsible floor;
• d) providing a first combustible propellant charge in the propellant chamber;
• e) providing an ignition means for igniting the combustible propellant charge;
• f) disposing a piston located between the propellant chamber and the lower chamber;
• g) forming the lower chamber to function as a drug reservoir chamber situated beneath the piston, said lower chamber having a puncturable floor membrane and
• h) forming an outlet port beneath the puncturable floor membrane and extending through an aperture in the bottom face of the drug reservoir chamber to enable ejection of the drug therefrom;
• i) attaching the drug storage and delivery module to a patient;
• and
• j) programming the control means to administer the desired drug or drugs in a single, continuous or periodic interval.