I used clomid at the end for 3 weeks. I felt really tired, no sex drive, weights went down 10-20lbs per core exercise. That was my 3rd, and that was the only time I felt like shit after stopping. On the plus side though, I did set new PR's on EVERY lift. Gained about 15 lbs. Maybe it was I felt so damn good while on, that feeling normal sucked. You'll feel great when on, and none of the people I know had any aggressive probs with it.