Minocycline
"43 year old with embarrassing blind pimples often turning to revolting whiteheads around chin area. First 2 weeks no clear improvement probably a little worse. Existing pimples seemed to flare up with whiteheads. I don't know if it's all the bacteria finding a way out? Its been 2 weeks & finally seeing clearer skin. No whiteheads or blind pimples just purple spots that will hopefully heal.   No side effects at this point. Taking one morning & night."