"i was on minocycline100mg 1 time a day for exactly 5 weeks. the end of the 4th week i started breakout out in tiny little painful pimples all around my nose chin and forehead (places i never really had acne before) it cleaned the places i usually do get acne pretty well though.  anyways my 5th week i never told my derm this happened and he decided on his own to switch me to bactrim because he said it&#039;d be more effective. he told me start the new meds right away. i&#039;ve been on the new meds for about a week now and the breakouts in those areas have gotten worse not better. i&#039;m so confused :( also there are some side effects my dr never warned me about. i felt dizzy and sick if i didn&#039;t take with food, also drink lots of water!!"