Syringeability:

It is the ability of a parenteral solution or suspension to pass easily through a hypodermic needle, especially during the transfer of product from vial to hypodermic syringe prior to injection. ↑ syringeability → ↓ flowing characteristics, thus make material transfer through the needle more difficult:
o The viscosity of the vehicle
o The density of the vehicle
o The size of suspended particulate matter
o The concentration of suspended drug