A syringe for medical use, comprising: a barrel comprising: a fluid chamber comprising a tubular sidewall extending longitudinally, a nose disposed forwardly of the fluid chamber, a rearwardly facing opening, and two oppositely facing, substantially flat, parallel indicia display surfaces (220, 236) extending longitudinally along the tubular sidewall and disposed in fixed relation to the fluid chamber, each of the indicia display surfaces (220, 236) comprising a longitudinally extending rail projecting inwardly from an inwardly facing wall and volumetric dosage scale indicia disposed on an outwardly facing wall to facilitate reading of a liquid level inside the fluid chamber through at least a portion of the tubular sidewall; a plunger slidably inserted into the fluid chamber through the rearwardly facing opening; a needle projecting forwardly from the nose in fluid communication with the fluid chamber; and a needle safety device comprising a needle tip shield, an activation handle disposed rearwardly of the needle tip shield, and a longitudinally extending channel disposed on each side of the activation handle; wherein the longitudinally extending channels are cooperatively sized and configured to engage and provide a slidable interface with the longitudinally extending rails of the indicia display surfaces (220, 236) to allow the needle safety device to slide between a first stop position and a second stop position relative to the barrel; wherein the needle tip shield circumferentially surrounds the nose of the barrel when the needle safety device is disposed in the first stop position; and wherein the needle tip shield circumferentially surrounds a front tip of the needle when the needle safety device is moved forwardly from the first stop position to the second stop position. a fluid chamber comprising a tubular sidewall extending longitudinally, a nose disposed forwardly of the fluid chamber, a rearwardly facing opening, and two oppositely facing, substantially flat, parallel indicia display surfaces (220, 236) extending longitudinally along the tubular sidewall and disposed in fixed relation to the fluid chamber, each of the indicia display surfaces (220, 236) comprising a longitudinally extending rail projecting inwardly from an inwardly facing wall and volumetric dosage scale indicia disposed on an outwardly facing wall to facilitate reading of a liquid level inside the fluid chamber through at least a portion of the tubular sidewall; a plunger slidably inserted into the fluid chamber through the rearwardly facing opening; a needle projecting forwardly from the nose in fluid communication with the fluid chamber; and a needle safety device comprising a needle tip shield, an activation handle disposed rearwardly of the needle tip shield, and a longitudinally extending channel disposed on each side of the activation handle; wherein the longitudinally extending channels are cooperatively sized and configured to engage and provide a slidable interface with the longitudinally extending rails of the indicia display surfaces (220, 236) to allow the needle safety device to slide between a first stop position and a second stop position relative to the barrel; wherein the needle tip shield circumferentially surrounds the nose of the barrel when the needle safety device is disposed in the first stop position; and wherein the needle tip shield circumferentially surrounds a front tip of the needle when the needle safety device is moved forwardly from the first stop position to the second stop position.