Levonorgestrel
"Reasons for the 9/10:



1) Cramping/spotting for 4-6 mos. My 1st time on Mirena, no period for 4yrs! 6yrs later, &6 days into 2nd Mirena I've got typical cramps/3.5d menstruation.



2) It could fall out/re-position itself in the cervix, (down from uterus). 5mos after a copper/hormone-free IUD, I found out that this had happened to me and I switched back to Mirena.



Many people have had adverse effects from this med. incl. depression, anxiety, mood swings, constant spotting, painful cramps+.



Having 5 years of experience on this med., then switching to a copper IUD for 5mos, I can say that Mirena has HELPED my depression/anxiety.  Every body is different. Plus I'm not going to get pregnant! So, all in all, I'd recommend this to anyone."