I have experienced the same problem - I had the Mirena put in last June and my libido has taken a serious nose-dive ever since. I went from wanting it all the time to not wanting it more than once a month. If I don't find a solution shortly I will have the Mirena removed. It is rather pointless to have the IUD's hormones pumping into me non-stop, when it has erradicated my sex-drive completely. Ugh.