Comparing Mannitol and Polyethylene Glycol for Better Bowel Preparation

Effectiveness of 1L Mannitol Versus 1L Polyethylene Glycol Electrolyte Dispersion as a Salve for Patients With Inadequate Bowel Preparation: a Randomized Controlled Clinical Trial

Not applicable Interventional Ningbo No. 1 Hospital · NCT05912114

This study tests whether a new drink called mannitol can help people prepare better for a colonoscopy compared to the usual drink, polyethylene glycol (PEG), to see if it makes the process easier and more effective.

Quick facts

PhaseNot applicable
Study typeInterventional
Enrollment134 (estimated)
Ages18 Years to 75 Years
SexAll
SponsorNingbo No. 1 Hospital Academic / other
Locations1 site (Ningbo, Zhejiang)
Trial IDNCT05912114 on ClinicalTrials.gov

What this trial studies

This clinical trial evaluates the effectiveness of mannitol versus polyethylene glycol (PEG) electrolyte dispersion in improving bowel preparation for patients undergoing colonoscopy. It aims to address the issue of inadequate bowel cleansing, which can lead to rescheduling procedures. The study focuses on patient compliance, as mannitol is expected to be more palatable and easier to take than PEG, potentially leading to better outcomes. Participants will be randomized to receive either mannitol or PEG before their colonoscopy.

Who should consider this trial

Good fit: Ideal candidates are adults aged 18-75 with inadequate bowel cleanliness prior to their first colonoscopy.

Not a fit: Patients who are pregnant, have a history of colorectal surgery, or have severe medical conditions may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could lead to improved bowel preparation methods, enhancing patient compliance and outcomes for colonoscopy procedures.

How similar studies have performed: Previous studies have shown that oral PEG is effective, but this approach using mannitol is relatively novel and untested in this specific context.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Patients aged 18-75 years with a pre-first colonoscopy bowel cleanliness of less than 2 points in any segment of the bowel.

Exclusion Criteria:

- (1) Pregnant women. (2) History of colorectal surgery. (3) Patients with acute exacerbation of inflammatory bowel disease. (4) Patients with severe medical conditions that make them unsuitable for colonoscopy.

(5) Patients with known allergy to mannitol/PEG. (6) Patients who refuse to sign the informed consent form.

Where this trial is running

Ningbo, Zhejiang

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Bowel CleansingGood Taste
Last reviewed 2026-06-09 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.