yes, propecia side effects. I've been on fina for 13 months now and just 2 months ago i've been having these side effects. Diffuculty getting and mainting an erection and shitty performance overall. It sucks, but the whole thing about creatine is that i used it about 2 or 3 years ago and i remember my performance was boosted for sure. I had a lot more stamina, and my erections were rock hard, but at that time even without the creatine they were rock hard because i wasn't on finasteride then.