Sulfamethoxazole / trimethoprim
"I've been on this med for 2 weeks so far and will be continuing for about a month ...I have some bacterial acne since the birth of my second child :( and I couldn't handle it anymore !!) I feel so bad for all the people  with bad experiences but I have to say I've had none...and I take the full dose twice a day I have had a wee headache a few times but nothing an advil  didn't cure, so I guess use at your own risk? But working great for me personally"