NCT02547571 (B-CLEAN) is a Phase 4 clinical trial of High volume PEG split-dose in Subjets Requiring a Colonoscopy, sponsored by Alan Barkun.

Who is sponsoring NCT02547571?

NCT02547571 is sponsored by Alan Barkun.

What drugs are being tested in NCT02547571?

Interventions in NCT02547571: High volume PEG split-dose, Low volume PEG split-dose, High volume PEG non split, day before, Low volume PEG non split, same day, Clear liquid diet, Low residue diet, Early colonoscopy (stratified), Later colonoscopy (stratified).

What condition does NCT02547571 study?

NCT02547571 studies Subjets Requiring a Colonoscopy.

Is NCT02547571 still recruiting?

NCT02547571 is currently completed. Last updated 12 September 2018.

Last reviewed 2018-09-12 · How we verify

NCT02547571: B-CLEAN

Name: Drug Landscape Pharmaceutical Database
Creator: Drug Landscape
Published: 2026-01-01
License: https://creativecommons.org/licenses/by/4.0/

The Bowel CLEAnsing: A National Initiative

Completed Phase 4 Last updated 12 September 2018

What this trial tests

Phase 4 trial testing High volume PEG split-dose in Subjets Requiring a Colonoscopy in 3,476 participants. Completed in 1 September 2018.

Timeline

1 March 2016

Primary endpoint
1 September 2018

1 September 2018

Quick facts

Lead sponsor	Alan Barkun
Phase	Phase 4
Status	Completed
Study type	INTERVENTIONAL
Allocation	randomized
Design	parallel
Masking	single
Primary purpose	treatment
Enrollment	3,476
Start date	1 March 2016
Primary completion	1 September 2018
Estimated completion	1 September 2018
Sites	10 locations across Canada

Drugs / interventions tested

High volume PEG split-dose — full drug profile →
Low volume PEG split-dose — full drug profile →
High volume PEG non split, day before — full drug profile →
Low volume PEG non split, same day — full drug profile →
Clear liquid diet
Low residue diet
Early colonoscopy (stratified)
Later colonoscopy (stratified)

Conditions studied

Subjets Requiring a Colonoscopy — all drugs for Subjets Requiring a Colonoscopy →

Sponsor

Alan Barkun — full company profile →

Who can join

18 and older, any sex, with Subjets Requiring a Colonoscopy. Patients with the condition only — healthy volunteers not accepted.

What's being measured

Primary outcomes are the specific endpoints the trial is designed to prove or disprove.

Bowel cleansing according to the Boston Scale
Time frame: Day of colonoscopy

Sponsor's own description

The purpose of this study is to compare diet, type of bowel preparation and time of colonoscopy to determine if one method is better than the other and, if they are the same, identify the one which is the most convenient for the patients.

Publications & conference data

2 peer-reviewed publications reference this trial (live from Europe PMC):

The Bowel CLEANsing National Initiative: High-Volume Split-Dose Vs Low-Volume Split-Dose Polyethylene Glycol Preparations: A Randomized Controlled Trial.
Barkun AN, Martel M, Epstein IL, Hallé P, et al · · 2022 · cited 15× · PMID 34509641 · DOI 10.1016/j.cgh.2021.09.005
Multicentre endoscopist-blinded randomised clinical trial to compare two bowel preparations after a colonoscopy with inadequate cleansing: a study protocol.
Sey MSL, von Renteln D, Sultanian R, McDonald C, et al · · 2019 · cited 3× · PMID 31289092 · DOI 10.1136/bmjopen-2019-029573

Verify or expand the search:

Verify against primary sources

ClinicalTrials.gov — authoritative US registry record
WHO ICTRP — international registry index
EU Clinical Trials Register
Sponsor press releases (Google)

Data sources for this page

Trial protocol + status: ClinicalTrials.gov NCT02547571 (US National Library of Medicine, public domain)
Publications: Europe PMC API search by NCT ID, retrieved 10 June 2026
Drug + disease cross-links: matched in real time against Drug Landscape's normalised drug + company + condition tables
Sponsor: as reported to ClinicalTrials.gov by Alan Barkun
Last refreshed: 12 September 2018

Drug Landscape aggregates and links these public records for informational use only. Always verify against the primary source before clinical or regulatory decisions. Canonical URL: https://druglandscape.com/trial/NCT02547571.

Primary sources · FDA · ClinicalTrials.gov · EMA · SEC EDGAR · ChEMBL · Wikidata · full sourcing