Risks The risks of this study include the use of a colonoscopy bowel preparation agent that is not FDA approved for this indication as well as the inherent risk of colonoscopy. The added risks of this study are only related to the preparation. Risks from the preparation include failure to cleanse the colon adequately and the risk of electrolyte abnormalities, particularly hypokalemia. The risks of undergoing colonoscopy include bleeding potentially requiring transfusion of blood products, infection, bowel perforation possibly requiring surgical intervention, adverse reaction to anesthesia/sedation, and missed lesions. These risks are rare and are standard for any colonoscopic exam regardless of study participation.