http://www.medications.com/effect/view/35676 Heavy chest, find it hard to breath, palpitations, weight gain around my stomach and hips (I've never had a problem with putting on weight prior to having the coil fitted) mood swings, very, very tender and sore breasts. Lack of Sex drive or being attracted Thu, 16 Oct 2008 15:26:22 -0400 http://www.medications.com/effect/view/35676?item=13516 Girl!!!!! Go see you pcp!! Heavy chest and palpitations are a bad thing no matter what you decide to do with the mirena. But i recommend looking at drugs.com for side effects of mirena listed under adverse reactions!!! also try FDA web site!! Good luck!! http://www.medications.com/effect/view/35676?item=13516 Thu, 16 Oct 2008 19:16:11 -0400 http://www.medications.com/effect/view/35676?item=13525 These are the same side effects that I had with the Mirena. My heart rate is still high all the time. I must admit that I do feel extremely better. I had the Mirena removed on August 25, 2008. http://www.medications.com/effect/view/35676?item=13525