A measurement sleeve adapted for use with a medication syringe including an optically transparent body defining an axial passageway therethrough for receiving a barrel of the medication syringe therein, at least one lateral face through which the barrel is visible when the barrel is within the axial passageway, measurement indicia marked on the at least one lateral face along a portion of the length of the axial passageway, and a barrel lock at one end of the body configured to lock the barrel to the body to prevent relative axial movement therebetween.
