Objectives: Safety and effectiveness of large-volume polyethylene glycolbased solution (PEG-ES) have been documented, but the taste and volume can be barriers to successful colonoscopy preparation. Efficacy and safety of small-volume electrolyte-free (PEG-P) preparation (Miralax) for colonoscopy preparation have been rarely studied, although presently used at many pediatric centers. The primary objective of the present study was to determinewhetherPEG-P resultsina moreefficaciousandsafecolonoscopy preparation as compared with senna. Methods: The study design was prospective, randomized, and singleblinded. Patients ages 6 to 21 years were randomized to a 2-day cleanout regimen of PEG-P at a dose of 1.5 g/kg divided twice per day for 2 days versus senna 15 mL daily (ages 6‐12) or 30 mL daily (ages 12‐21) for 2 days. Both preparations required 1 day of clear liquids whereas senna preparation required an additional day of full liquid diet. A blinded endoscopist graded the quality of preparation with a standardized cleanliness tool (Aronchick scale). Serum chemistry panels were obtained. Patients or parents rated symptoms and ease of preparation. The anticipated number of subjects was 166; however, the interim analysis demonstrated inferiority of senna preparation. Results: Thirty patients were evaluated in the present study. Of the patients in the PEG-P arm, 88% (14/16) received an excellent/good score compared with 29% (4/14), with the senna preparation (P ¼0.0022). Both preparations were well-tolerated by patient-graded ease of preparation. Demographics and laboratory values did not differ significantly across the 2 groups. No serious adverse events were noted. Conclusions: PEG-P is an effective colonoscopy preparation whereas senna preparation was insufficient. Both were well-tolerated and appear safe in a pediatric population.
