Yesterday was my third day to take it. I took 20iu each injection for a total of 120iu. Had to go to the bathroom once within about 20 minutes of taking it, but that was it. No other side effects or urges to go to the bathroom. So hopefully I'm getting used to it. 20iu in each bicep isn't bad at all on the pain factor. My biceps are only a stiff for about 30 minutes and that's it. They just feel like a kinda worked them out, but not real hard. I'm using insulin pins that are 30 guage and only 5/16 inch, so maybe I'm not going deep enough in the bicep?? I think that it was Stew that said he got bruises after he injects. I'm getting the same thing in my chest and stomach, not biceps. Maybe it's because I'm not going into the muscles there. I jab and then pull back and get air so I know I'm not hitting a vein, any other ideas on what would cause these. It doesn't bruise real bad, and isn't even black, but just a little bit yellowish brown in color.