Evenity is a 12 month course of injections, 2 each month. I experienced the muscle/joint aches pretty severely by month 8 or so. I stopped at month 11 and am on Actonel and doing well. I have posted previously about adverse reactions on this site. Hope this helps! Evenity improved my bone density most significantly in my spine and that was the worst site. Went from -3.8 to -2.1. Took all three test spots out of osteoporosis range. It did feel like I had bad arthritis, which I don't but after 6 months it went away for the most part. I think a bit of aching I have now may be from Actonel but easily tolerated and not debilitating like last months of Evenity. I don't regret doing it but at the time when I was so uncomfortably I thought I had made a terrible mistake. Best to you!