birth control
"My Dr. Suggested it  after my 3rd child,so I decided to get it. I missed the first period After taking the shot, but started for the second one. I've been bleeding for a month straight now. Its increased my appitite, making me gain 20 pounds in 2 months.I've recently started working out so I've been trying to loose it. I've never had an acne problem, but now my face breaks out terribly too. I've been moody, with crazy head aches. 
It is a hormone. So obviously it's going to have some hormone related side effects. Read the pamphlet , check out reviews... Remember it's an injection of hormones into your body, doctors don't know exactly what the side effects you'll have , if you have any.basically you're a human lab rat. "