Safety and Efficacy of OsmoPrep® Tablets Versus HalfLytely® and Bisacodyl Tablet Bowel Prep Kit for Colon Cleansing

Inclusion Criteria: * Between 18 and 70 years of age, inclusive * Scheduled for colonoscopy within 21 days of the screening visit * Able to swallow tablets the size of a multivitamin without difficulty Exclusion Criteria: * History of biopsy-proven acute phosphate nephropathy * Known allergy or hypersensitivity to treatment arms * History of gastric stapling or bypass procedure or history of gastric retention * History of any other sodium phosphate preparation within 6 months prior to colonoscopy