Taking sulfameth/trimethoprim for acne.doctor said it can take is long as 4 months to work. i have been on for 2 months. i still have acne.

Acne oral antibiotic: Trimethoprim-sulfamethoxazole is effective in the treatment of severe acne. However, its use is limited by the potential for bone marrow suppression and for the development of severe immune-mediated drug eruptions such as toxic epidermal necrolysis. Oral antibiotics should be used for a limited course, ideally up to 12 to 18 weeks. Other antibiotics like tetracyclines can be used.

REALISTIC EXPECTATNS: If you don't know now, be aware that some battle acne well into their 30's.It is a condition heavily influenced by genetic factors. Your best treatment is one you come to by trial and error, involving both your efforts in a daily skin routine and fine tuning by a dermatologist.Learn as much as you can and ask questions, this routine may or may not help, but you must find the answer yourself.