Effect of Cannabinoid Agonist on Gastrointestinal and Colonic Motor Functions in Patients With Irritable Bowel Syndrome (IBS)

Dronabinol is a synthetic delta-9-tetrahydrocannabinol, a nonselective cannabinoid agonist. Subjects will receive either 2.5 mg bid, or 5 mg bid, taken orally with water for 2 days.

Placebo will match study drug; taken orally with water twice per day for two days.