http://www.msnbc.msn.com/id/10535637/
A new study/information has seen a cause and effect relationship with certain types of heartburn medicines such as Previcid and Prilosec and intestinal distress--namely diarrhea, cramping and colitis as caused by C. difficile bacteria. As some of you may know, this is the same bad bacteria that crops up after a round of antibitiocs, but apparently something about these heartburn medicines also gives it room to grow into a menance.
If you have IBS-D and are taking the heartburn meds listed in the report, I would suggest taking a copy of the article to your doctor and getting a different kind of medicine. You may also want to get tested for C. difficile because it can be treated with a combination of antibiotics and probiotics.