Golytely lavage--is metoclopramide necessary?

Area of Science:

• Gastroenterology
• Clinical Pharmacology

Background:

• Colonoscopy requires effective bowel preparation for diagnostic accuracy.
• Golytely is a commonly used polyethylene glycol-based lavage solution.
• Patient tolerance and preparation adequacy are key factors in colonoscopy success.

Purpose of the Study:

• To evaluate the efficacy of oral metoclopramide in improving patient tolerance and preparation quality during Golytely cleansing for colonoscopy.
• To assess two different doses of metoclopramide (10 mg and 20 mg) against placebo.

Main Methods:

• Two randomized, placebo-controlled studies were conducted.
• Study 1: 10 mg metoclopramide vs. placebo (n=21 vs. n=27).
• Study 2: 20 mg metoclopramide vs. placebo (n=21 vs. n=25).
• Patient-reported symptoms and physician assessments of colon cleansing were recorded.

Main Results:

• 10 mg metoclopramide showed no significant difference in symptom tolerance compared to placebo.
• 20 mg metoclopramide was associated with less cramping (p=0.02) but increased nausea (p=0.03) versus placebo.
• No significant differences in rectal effluent clearing time, patient preference for Golytely, or physician-assessed preparation adequacy were observed between metoclopramide and placebo groups.
• Adequate colon cleansing was achieved in 97% of all patients, with optimal cleansing in 80%.

Conclusions:

• Neither 10 mg nor 20 mg oral metoclopramide significantly improved the adequacy of colon cleansing for colonoscopy.
• Metoclopramide did not effectively decrease symptoms associated with Golytely lavage.
• The use of metoclopramide in conjunction with Golytely for colonoscopy preparation does not appear to offer substantial benefits in preparation quality or symptom management.