A Safety Study of 3 Different Bowel Cleansing Preparations

Inclusion Criteria: * Male or female outpatients who are undergoing colonoscopy for a routinely accepted indication. * At least 18 years of age * If female, and of child-bearing potential, is using an acceptable form of birth control * Negative urine pregnancy test at screening, if applicable * In the Investigator's judgment, subject is mentally competent to provide informed consent to participate in the study Exclusion Criteria: * Subjects with known or suspected ileus, severe ulcerative colitis, gastrointestinal obstruction, gastric retention, bowel perforation, toxic colitis or megacolon. * Subjects who had previous significant gastrointestinal surgeries. * Subjects who have uncontrolled clinically significant pre-existing electrolyte disturbances. * Subjects with severe liver or renal insufficiency. * Subjects with a history of congestive heart failure or other clinically significant cardiac abnormality. * Subjects with impaired consciousness that predisposes them to pulmonary aspiration. * Subjects undergoing colonoscopy for foreign body removal and decompression. * Subjects who are pregnant or lactating, or intending to become pregnant during the study. * Subjects of childbearing potential who refuse a pregnancy test. * Subjects allergic to any preparation components * Subjects who, in the opinion of the Investigator, should not be included in the study for any reason, including inability to follow study procedures. * Subjects who have participated in an investigational surgical, drug, or device study within the past 30 days.