"mirena is an exceptional form of birth control i&#039;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&#039;t have menstrual cramps any longer i have experienced weight gain and fluctuation but i&#039;ve always struggled with my weight so i don&#039;t solely blame that on mirena, as well as my acne its hasn&#039;t improved or gotten worse but mirena is my preferred method of birth control, it works and i couldn&#039;t do the pill or the shot."