Levonorgestrel
"Mirena is an exceptional form of birth control I've had it since July 2010. I still suffer from side effects I have uncontrollable mood swings. I go in and out of depression. I have two periods a month now, one of them is light the other can be moderate to pretty heavy. The day of my insertion I started cramping so bad I was nauseated but was fine the next day about the only thing that has gotten better is that I don't have menstrual cramps any longer I have experienced weight gain and fluctuation but I've always struggled with my weight so I don't solely blame that on Mirena, as well as my acne its hasn't improved or gotten worse but Mirena is my preferred method of birth control, it works and I couldn't do the pill or the shot."