Hydrofluoroalkanes (HFA) powered and liquefied gas powered apparatus and instruments for use in or in relation to drug and pharmaceutical delivery devices, namely, hydrofluoroalkanes (HFA) powered drug delivery systems in the nature of infusion and injection devices administering drugs; hydrofluoralkanes (HFA) powered medical syringes, medical fluid auto-injectors for administrating pharmaceuticals and drugs and apparatus and devices for the inhalation or injection of pharmaceuticals and drugs; hydrofluoroalkanes (HFA) powered devices, apparatus and instruments for use with drug and pharmaceutical delivery devices that convey drug and pharmaceutical delivery dosage, measuring and monitoring information through audio, visual and/or tactile patient feedback mechanisms; hydrofluoralkanes (HFA) powered medical syringes, medical fluid auto-injectors and apparatus and devices in the nature of drug delivery systems incorporating audio, visual and/or tactile patient feedback mechanisms to convey dosage, measuring, and monitoring data for the purpose of facilitating and monitoring drug and pharmaceutical delivery and administration; medical syringes; medical syringe stoppers; hydrofluoroolefin (HFO) powered medical fluid auto-injectors and medical fluid injectors; hydrofluoroolefin (HFO) powered apparatus and devices for administering pharmaceuticals and drugs, namely, medical apparatus in the nature of infusion and injection devices for administering drugs, medical tubing for administering drugs, and hypodermic needles; hydrofluoroolefin (HFO) powered drug delivery apparatus, namely, drug delivery systems, electromagnetic drug delivery apparatus for medical use; medical fluid auto-injectors; medical fluid injectors; disposable syringes and medical fluid injectors; hypodermic syringes; apparatus and devices for administering pharmaceuticals and drugs, namely, medical apparatus in the nature of infusion and injection devices for administering drugs, medical tubing for administering drugs, and hypodermic needles; sterile medical syringes and medical fluid auto-injectors for the administration of pharmaceuticals and drugs; cartridges for medical syringes; nozzles for medical syringes; drug delivery apparatus, namely, drug delivery systems, electromagnetic drug delivery apparatus for medical use; oral and nasal medication dispensers, namely, nasal aspirators, aerosol dispensers for medical use; aerosol dispensers for medical purposes; parts and fittings for all the aforesaid