A fluid dispensing device, particularly suited to medicine but also having many other applications. The device selectively dispenses any of one or more fluids contained within the device. Adapters on the dispensing end of the unit permit the device to be effectively used for intra-venous, intra-dermal or intra-muscular injections, gasses, colloids, gels, liquids or other fluids. Adapters on the head of the unit permit the device to be used with or without electrical power and to varying degrees of automatic control for timing, sequence, volume of fluid dispensed and other features.