Minocycline
"Only on my second week of treatment but its not looking so good. I got it to treat some cystic acne on my back and my skin cleared up quickly the first week. However I'm tired all of the time, and the cystic acne's coming back with a vengeance. Just broke out with a line of huge pimples down my lower back which has never happened, and some on my face, all of which are very painful. I'll continue the treatment for a few more weeks but so far things aren't looking good."