I have 10,000 iu vile of HCG and 30 ml of bacteriostatic water. How much water do i inject in the vile? What is the dosage measure out to on a a u100 insulin needle if I want to inject 250 iu's a day? I'd figure all this out myself but I don't know the u100 slin needles capacity in milliliters. Also why does a u100 needle measure out only 50 units? Sorry, should have gone to nursing school.