"generally my acne went away with use of clindamycin cream for a 7 month period. but i got two giant pustules and i was prescribed doxycycline 100mg once a day to treat these issues. the third week my acne got awful but by week 4 it cleared up. i still get zits but no major acne. overall its been good but i have only been on it a month so i think by month 2 or 3 it will be gone. stick with it and don&#039;t give up."