acne
"15 year old daughter used Minocycline for 2 months and it was super at clearing her whiteheads-face, back, neck. Then we took a break, acne came back. MD gave us brand name version (1 pill/day verses 2per/day with generic, and much more expensive) and it didn't work at all after 2 months.  Tried generic minocycline again after waiting a few months, and unfortunately we saw no results second time around.  Trying birth control pills now."