Thank you! It was quite a relief to hear it is reversible. My doctor prescirbed Foxamax, which you take just once a week. I only get *four* pills for my copay - that's almost as much as my dogs heartworm medicine! Anyway, I'm supposed to take it for six month and then come back for another bone scan. It seems you can't take it if you have acid reflex, as it can be very hard on the esophagus. Took first pill Sunday, haven't noticed any side effects. This feel sort of like Harry Potter when Madame Pomfrey grows his bone back. I'll try to get to the gym more, too.