I agree. I had done some generic blue caps a while back at 2iu and had no side effect. I noticed when I started the TevTropin I felt strange. I think there is definitely a difference. I thought I was doing the right thing by using pharma. It's the biggest mistake of my life. I've also got cubital tunnel which I think can be attributed to the growth. So I need surgery as well. It's become very hard for me to go on.