Safety and Efficacy of High Dose Bowel Preparation Solutions for Patients With Difficult To Clean Colons For Colonoscopy

Inclusion Criteria: * Patients at least 18 years old planning to undergo an elective colonoscopy will be eligible for inclusion in our study if they had a previous colonoscopy with an inadequate preparation. Exclusion Criteria: * Patients who are pregnant. * Patients with ileus, gastrointestinal obstruction, gastric retention, bowel perforation, toxic colitis or toxic megacolon would not be considered elective colonoscopies and are excluded.