I just started Fosamax for osteoporosis. I can't afford evenity so trying Fosamax which Medicare advantage covers. I am worried about the side effects of Fosamax, esp jaw decay. I'm on my 4 th dose and do have muscle and bone pain and headaches. I researched Evista and it seemed to have less side effects, but has possible blood clots and hot flashes. Glad to hear you're doing good on Evista with little side effects. I am going to ask my pcp about Evista. Best to you.