^^ Like rob and the others have said. I've used accutane roughly about 3-4 years ago. At the time I was training mixed martial arts and doing powerlifting. Accutane has no real effects on my training, but the dryness of my skin and lips were the worst part. It sometimes felt like my skin was burning. (Probably not the best thing). But after a few months of treatment my acne was completely gone and hasn't come back since.
Good luck and I hope you make the right decision for yourself.