Sulfamethoxazole / trimethoprim
"I'm 17 and started getting acne the beginning of freshman year. I was first put on benzyclin (idk how it's spelled) then I tried retin A. Sophomore year and junior year I used face washes which only broke me out more. Finally deciding to go back to the doctors after years for my acne, I explained how topical a hadn't worked for me so my doctor prescribed me Bactrim. I never heard if it and was worried it wouldn't work although she did say it was a powerful antibiotic. So far it's been 3 months and I've noticed a difference within the second week not drastic but a difference. I want to stay on as long as I can or until I'm out of the acne stage. Just make sure you are not allergic to sulfa"