The invention is a single use delivery device configured to enable reconstitution of a lyophilized agent (e.g. vaccine drug medicament etc.) stored within for subsequent delivery of the reconstituted fluid agent to a patient in a controlled manner and without requiring specialized skill in reconstituting the agent or administering delivery of such agent. The delivery device is prefilled with an individual dose of a lyophilized agent and configured to be filled on site and in the field with a dose of diluent for reconstitution of the lyophilized agent while remaining sterile and preventing the potential for contamination during the filling process. The delivery device is further configured to be rendered incapable of reuse followings its intended use of delivering the fluid agent to a patient thereby preventing reuse of the device and reducing the risk of the spreading blood borne diseases through reuse.
