I have osteopenia and the rheumatologist was fairly insistent that I take medication for bone sparing. I refused Prolix - the side effects can last a long time and include joint pain. Just what I need! I opted for Boniva and so far so good. I also read an article from the NIH that using a vibrating table can not only stop bone loss but improve bone density so I bought one. It's easy and a slow process to get up to the therapeutic level but no more drugs in my system.