I just turned 74 yrs old. My doctor prescribed Fosamax for OP. I took one dose the first morning and had a "strange" diarrhea later that day. I have now researched and read reviews on Google as well as reports of people on this format (thank you Mao Connect for this awesome website!). I am shocked that the side effects include causation of thigh bone breakage and brittle bones. My heart goes out to the people who have had jawbone deterioration and teeth breaking off after being on Fosamax for years.
I have decided to forego the Fosamax. I plan to include bone broth and Andrew Lessman's Marine Collagen in my diet, as well as the supplements Vit K in form of MK-7, dicalcium maltrate, magnesium, D3, and boron (helps absorption of calcium). I just found a supplement called Calciven that contains all those. I am walking everyday and plan to have a bone density test in a year to monitor any progress.
I am thankful to all who have shared their experience and info. I wish everyone a blessed journey.