A hand-held, pneumatically-powered device designed to inject medication (especially a local anaesthetic) or vaccine transcutaneously into the human body. It is needleless and may have various configurations according to its application. It will typically be a pistol-shaped plunger driven instrument with single or multi-pointed holed barrels through which the medication/vaccine is driven under high pressure by compressed gas. The delivered medication/vaccine will typically be supplied in prefilled containers that are loaded into the device. This is not a hypodermic syringe. This is a reusable device.