Medroxyprogesterone
"I've been on the depo shot for about 5 months, the first 2 months were great; I didn't get my period and I felt normal. Ever since the 3rd month I have had spotting that comes and goes; sometimes it lasts for days and other times it is just a 'discharge' that happens throughout the day that I can usually predict because of the cramping it comes with. I like the easiness of the shot, but the side effects are annoying and not worth the trouble. Especially after reading other reviews, I think I'll go back on regular birth control."