Study 301: BLI4900 Versus an FDA-approved Comparator in Adult Subjects Prior to Colonoscopy

Inclusion Criteria: * Male or female outpatients who are undergoing colonoscopy for a routinely accepted indication. * 18 to 85 years of age (inclusive) * If female, and of child-bearing potential, is using an acceptable form of birth control. * Negative serum 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, gastrointestinal obstruction, gastroparesis, gastric retention, bowel perforation, toxic colitis or megacolon. * Subjects with inflammatory bowel disease who have a history of any bowel resection (small intestine or colon), suspected active inflammation, or symptoms suggestive of obstruction or known bowel stricture. * Subjects who had previous significant gastrointestinal surgeries. * Subjects who have regularly used laxatives or colon motility altering drugs in the last month (i.e. more than 2-3 times per week) and/or laxative use within 72 hours prior to administration of the preparation * Subjects with uncontrolled pre-existing electrolyte abnormalities, or those with clinically significant electrolyte abnormalities based on Visit 1 laboratory results. * Subjects taking diuretics, anti-hypertensive medications, including angiotensin converting enzyme (ACE) inhibitors and Angiotensin II receptor blockers (ARBs), or chronic NSAIDs, that have not been stable for 30 days. * Subjects with uncontro…