I was on 150mg of ranitidine a day and 2 omperazole. I had to quit the omperazole because of 13.9% bone loss in 2 years. now my gastro Dr wants me to take 300mg ranitidine 2 times a day. Too much thyroid caused bone loss, bone med caused sever stomach problems and I had to stop that because it is not safe to take it for so long, Dr gave me ranitidine and omeprazole and that caused bone loss. I have come NOT to trust the medical profession. Thus I want to know what 600mg of ranitidine could do to me.