abnormal uterine bleeding
"I have been on sprintec for over a year. All has been well and it has clearly worked for the purpose of preventing pregnancy. The one mistake I made was slipping my placebo pills and going on to the next pack instead, to avoid period. The period came two weeks later during my regular pills, and since then I have been spotting this dark brown gooey stuff. It sucks, but other than that I haven't had any problems with it."