I have been doing more research. SKZ, from what I found Zantac, Pepsid, Tagamet are histamine blockers and do not seem to have the same effect as proton pump inhibitors. Nexium, Prevacid, Prilosec and Protonix shut down the chemical pump needed by stomach cells to make acid. Apparently in doing this calcium is not absorbed as it should be and this results in a bone density loss. If you are over 50 and take these drugs for one year you have a 44% increase in the chance of a hip fracture. The higher the dose and the longer you take the drug the higher the chance of fracture. The drug manufactures are saying the same stuff they always say. They have tested the drugs and continue to test them and find little or no correlation to bone density loss other than what would be considered normal. I imagine the truth lies somewhere in between. I may never have an answer to my question about bone fusion. All I know is it really makes my stomach hurt.