I started my test c cycle about a month ago and gave blood last week. I had trouble once before from having too much blood in my system, which was caused from my cycle, so I'm not messing around again. I am going to donate blood every 8 to 12 weeks. I run long cycles which don't help either.
One thing that I want to mention is that when I went through the mini physical before donating, they ask if I have taken anything injectable and I told them yes that I was currently on test and hgh. They were ok with it.