A hypodermic syringe having a cylindrical outer body adapted to accept a smaller fluid storage vial within the inner walls thereof and having a removable cap on one end of said cylinder for providing access to insert and remove the vial with a spring loaded double headed needle assembly integrated into the other end thereof and held in place by a retainer until the storage has been punctured by one and of the needle, the vial filled and removed and the needle assembly retracted into the space vacated by the vial.
