Abstract: A single use needless syringe for administering a fluid medication. The syringe comprises a hollow, tubular body which includes a gas storage portion defining a storage chamber containing a quantity of pressurized gas. The body also includes an ejector portion defining a piston chamber which is selectively placeable into fluid communication with the storage chamber and has a piston movably disposed therein. In addition to the gas storage and ejector portions, the body has a barrel portion defining a delivery chamber for receiving a prescribed dosage of the fluid medication, with the delivery chamber being oriented relative to the piston chamber such that the piston is advanceable into the delivery chamber. A discharge orifice of the body fluidly communicates with the delivery chamber and allows the fluid medication to be filled thereinto and expelled therefrom.