I had a Nissen Fundoplication last year for severe acid reflux. I have had chronic diarrhea since the surgery. My Gastroenterologist told me that it sounds like dumping syndrome. I would have diarrhea just within 15-20 minutes or so after eating a normal sized meal. He prescribed Bentyl and I have only been taking it for a few days, and don't take it every day. Since this works, would it be best to assume I have IBS or could this still be dumping syndrome. Just wondering if anyone knew this answer.. I never had abdominal cramping, just severe urgency, and stomach gurgling, and sudden urge to have a BM. Since this medication, I go only 1 or 2 times a day not even related to meals. thanks