I am 66 and have been taking prolia for about 2 and a half years now. Within the last year I have had lower back pain twice and most recently it was quite severe. Be fore this last bout and currently both of my thighs seemed to have some pain. I work out quite often, play golf, swim, bike, walk. Since I m very active, it puzzles me as to why I suddenly have had this pain. Could it be related to taking the prolia? Thank you for help. Jennifer