A dosing syringe assembly comprising: a syringe barrel comprising an inner chamber filled or adapted to be filled with medicament, and a channel in fluid communication with the chamber and through which medicament is dispensed; and an end cap configured to be removably attached to the syringe barrel, wherein the barrel comprises an internal threaded section which mutually engages with a threaded section on the end cap to thereby create a seal, which prevents the flow of medicament therethrough, characterised in that: the syringe assembly is a single unit dose syringe assembly pre-filled with medicament; the end cap comprises a body with at least two mutually opposing projections, which extend transversely therefrom and which are configured to facilitate removal of the cap from the barrel; the syringe barrel is incompatible with a Luer lock, or a Luer slip; the syringe barrel does not comprise an external screw thread at least adjacent or towards the end of the barrel from which medicament is dispensed; the syringe assembly comprises a plunger configured to slide in the chamber, which plunger comprises a rod; and the syringe assembly comprises a transversely extending projection disposed on the side of the plunger rod, and an indentation disposed along the inside of the chamber, or vice versa, wherein alignment of the projection and indentation correlates with a defined volume of medicament and thereby a dosage. a syringe barrel comprising an inner chamber filled or adapted to be filled with medicament, and a channel in fluid communication with the chamber and through which medicament is dispensed; and an end cap configured to be removably attached to the syringe barrel, wherein the barrel comprises an internal threaded section which mutually engages with a threaded section on the end cap to thereby create a seal, which prevents the flow of medicament therethrough, characterised in that: the syringe assembly is a single unit dose syringe assembly pre-filled with medicament; the end cap comprises a body with at least two mutually opposing projections, which extend transversely therefrom and which are configured to facilitate removal of the cap from the barrel; the syringe barrel is incompatible with a Luer lock, or a Luer slip; the syringe barrel does not comprise an external screw thread at least adjacent or towards the end of the barrel from which medicament is dispensed; the syringe assembly comprises a plunger configured to slide in the chamber, which plunger comprises a rod; and the syringe assembly comprises a transversely extending projection disposed on the side of the plunger rod, and an indentation disposed along the inside of the chamber, or vice versa, wherein alignment of the projection and indentation correlates with a defined volume of medicament and thereby a dosage. the syringe assembly is a single unit dose syringe assembly pre-filled with medicament; the end cap comprises a body with at least two mutually opposing projections, which extend transversely therefrom and which are configured to facilitate removal of the cap from the barrel; the syringe barrel is incompatible with a Luer lock, or a Luer slip; the syringe barrel does not comprise an external screw thread at least adjacent or towards the end of the barrel from which medicament is dispensed; the syringe assembly comprises a plunger configured to slide in the chamber, which plunger comprises a rod; and the syringe assembly comprises a transversely extending projection disposed on the side of the plunger rod, and an indentation disposed along the inside of the chamber, or vice versa, wherein alignment of the projection and indentation correlates with a defined volume of medicament and thereby a dosage.