"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&#039;ve had no side effects. the monocycline gave me horrible joint aches (to the point where i&#039;d almost cry they hurt so bad). so far i have had absolutely no side effects. it&#039;s wonderful!"