Dronabinol 2.5 mg Bid

Dronabinol 5 mg Bid

Placebo

Total

Sex: Female, Male

Region of Enrollment

Body Mass Index (BMI)

The scintigraphic method is used to measure colonic transit. An isotope is adsorbed on activated charcoal particles and delivered to the colon in a delayed release capsule. Anterior and posterior gamma images are taken hourly. The geometric center (GC) is the weighted average of counts in the different colonic regions. The scale ranges from 1 to 5; a high GC implies faster colonic transit, a GC of 1 implies all isotope is in the ascending colon, and a GC of 5 implies all isotope is in the stool.

Colonic Transit Geometric Center

The time for half of the ingested solids or liquids to leave the stomach.

Gastric Emptying Half-Time (t1/2)

Percent of the radio-labeled meal that reached the colon at 6 hours, indirectly reflecting small bowel transit time.

Colonic Filling at 6 Hours

Ascending colon emptying t1/2 will be estimated by power exponential analysis of the proportionate emptying over time of counts from the colon. The primary data for this analysis will be the proportion of decay and depth-corrected counts in the ascending colon on the hourly scans on the first day of transit measurement and the 48 hour data.

Ascending Colon Emptying T 1/2

Proportion of stomach contents emptied at a 2 and 4 hours.

Gastric Emptying at 2 and 4 Hours

Colonic Transit Geometric Center at 24 Hours

Overall Study

Dr. Michael Camilleri

Irritable Bowel Syndrome

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.

Dronabinol

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

glycerol/олс

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

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