I came across this in the September issue of Prevention magazine:
"diarrhea and IBS.
"No Pepto in sight? Knock back a glass of wine (red or white). One study found it worked as well or better than the pink stuff, the alcohol's antibacterial properties killed off bacteria that cause traveler's diarrhea within 20 to 30 minutes. Don't overindulge--6 ounces is all you need."