Sulfamethoxazole / trimethoprim
"I cannot believe how amazing this medicine has been for my cystic acne. I have tried monocycline, doxycycline, prescription topical creams, NOTHING worked. I finally decided to ask my doctor about Bactrim. I have been completely cyst free since October. This is a record amount of time for me to have NO cysts! I have had, maybe three pimples. I've had no side effects. The monocycline gave me horrible joint aches (to the point where I'd almost cry they hurt so bad). So far I have had absolutely NO side effects. It's wonderful!"