I have PMR since May 2012. I suffered a displaced fracture of the femur two years ago (due to a fracture caused by the Alendronic Acid). It was pinned with an intermedulla femoral nail and screwed at the knee and hip. I was discharged at 10 weeks saying I had broken all records for healing, ( I was 68 then) however a year later I started suffering pain and despite having had x rays every three months and being told everything was normal I was told that the break had not healed due to the prednisilone. I can't see how it can have gone backwards if it was healing properly in the first place. I also have a stress fracture in the other femur - the same cause - which will have to be pined at some time before that snaps as well, but I am afraid that I will end up with two legs that are not healing due to the pred. Can this be the cause? I am currently on 12.5 daily, having reduced to 7.5 2 months ago and then having a bad flare up. I am also taking 150mg daily of Azathioprine which I think helped me reduce to the 7.5, but next time I go down I will stop at 8.