Medroxyprogesterone
"It works very well as a birth control (one of the best besides an iud) & is convenient because you only get the shot every 3 months. I got the shot for free from my health department, not sure of the cost under insurance or out of pocket. I'm 19. In less than 3 months on depo I gained almost 10 pounds, I now have cystic acne on my face and back, and my hormones are entirely out of whack. I get angry over nothing very often, and I'm extremely irritable. It causes bone density loss and it can take months to get your fertility back. I've had random spotting and bleeding throughout the past 3 weeks and I don't know how much more of it I can take. Do not get this birth control."