I've just had an upper endoscopy that confirmed acid reflux. I've been given a prescription for Prilosec, and I noticed that some of the side effects for Prilosec are diarrhea, gas, and stomach aches. Since I already have irritable bowel symptoms much of the time (bloating, gas, gurgly stomach, and several small bowel movements a day), I'm wondering whether the Prilosec might make my IBS problems worse. Have any of you with IBS plus acid reflux taken Prilosec or another PPI? I'd like to try it but wonder whether it will cause problems. Also, if I do get diarrhea from it, is that likely to go away in time or will I need to discontinue the medication? Anyone here had any experience with Prilosec who has problems like mine? Thanks very much.