Anastrozole
"Coming up on my 5 year anniversary so anastrozole evidently works.  However, after my last bone density test I find that my bones have thinned significantly and now have osteoporosis.  Have had other side effects, hot flashes, insomnia, joint pain, weight gain, thinning nails & hair but didn't attribute anything other than hot flashes to the anastrozole.  To prevent cancer I can live with most of those but if I had known how fast my bones were thinning I don't know if I would have stayed with it."