A randomized single-blind trial of split-dose PEG-electrolyte solution without dietary restriction compared with whole dose PEG-electrolyte solution with dietary restriction for colonoscopy preparation.

Background: Colonoscopy preparation regimens are poorly tolerated, requiring the use of a large volume of an unpalatable solution and diet restriction for adequate cleansing. The aim of this study was to compare the efficacy of two regimens of bowel preparation before colonoscopy: a whole dose of polyethylene glycol electrolyte solution (PEG-E), with diet restriction vs. a split dose with no diet restriction.