dawg im using 2 ius a day, but the kid i bought it from said that used this stuff filled up to 40 on his insulin needle and he said it only lasted a week?? Its just one single vial! so do i use an insulin syrigne or a regular one? The insulin syringe the kid was using had 100iu's and he fileld it up to 40 and he said that one of these lasted him about a week. And how far would i fill it up on the syringe to get 2 ius? thanks!Originally Posted by Iowa