I have taken Prevacid and omeprazole for 15 years .i recently took macrobid 3 mo ago and for 3 mo developed extreme pain and nausea to the point I couldn t eat ,also extreme burning of the mouth and stomach after calling and going to doctors I got no answers .i found out yesterday after talking to people and praying hard for help. That the generic Prilosec could be the culprit ,not the macrobid I took 3 months ago ,I almost went to the Er yesterday ,when I read the side effects of the omeprazole and spoke to a few people I discovered that I need to stop this medication ,I didn t take it today and still have a Lille burning and pain ,but I can feel I m getting better.im going to need to replace the omeprazole,I was told Zantac can replace it without the bone fracture side effects.is that so can I use Zantac over the counter .i am allergic to pepto bismo