Abstract: Disclosed herein is a self-zeroing dosage syringe comprising: (a) a syringe barrel which forms a volume sufficient to contain a required dosage of a fluid, a discharge end at one end of the barrel length, a plunger receiving end at the opposite end of the barrel length, (b) said plunger is movably disposed within the barrel and has a length greater than the length of the barrel, and further has at a set of multiple closely spaced indentations disposed along the length thereof, and (c) a movable dosage selection ring which is disposed around the plunger and rotatable about the longitudinal axis of the plunger; characterized in that the dosage selection ring has (1) a sleeve disposed inside the barrel, (2) a calibration on the sleeve thereof for setting the desired dosage by turning the ring until the calibration for a desired dose is reached, (3) a means for engaging the ring with the plunger allowing it to be moved cooperatively with the plunger until the ring dead ends against the syringe barrel thereby rele