<<Disclaimer: Verify this information before applying it to your situation.>> For those of you traveling abroad, I just taked with Steve Payne at Bayer Pharmaceuticals (1-800-288-8371) and he confirmed that the 'starch' in their Cipro (anti-diarrhea) tablets, commonly prescribed for travelers' diarrhea, is corn starch. After all, we don't want to trade one for of diarrhea for another!