"i got tri sprintec as a birth control but i should have gone on it a long time ago to regulate periods. i love being able to predict when i&#039;ll start bleeding and i love that it has shortened my periods (now it is six days). 
i had been on doxycycline for acne but it conflicted with the pill so i stopped. the first month of tri sprintec i was worried because i didn&#039;t stop bleeding. after the first month though, i&#039;ve had no problems and no irregular bleeding. i&#039;ve been on it for half a year."