Fluid Dispenser

A fluid dispensing device is provided for dispensing a measured amount of fluid into a living organism. The device has a needle having a first end and a second end. The needle is adapted for interfacing, on the first end, with a septum of a flexible hollow membrane, and at a second end thereof, for subcutaneously inserting into a living organism. The needle is guided by a guide to permit an injection into the living organism at a substantially non-orthogonal angle with respect to a surface of the living organism. The first and second ends of the needle pierce their respective piercing surface while translating together in a common direction. In other embodiments, the dispensing device includes a main housing, a flexible fluid reservoir, an injection assembly and a trigger mechanism. The main housing houses the operative components of the device.