Bowel Preparation for Colonoscopy Among Individuals With Crohn's and Ulcerative Colitis Disease.

This study compares two bowel preparation products — a standard large-volume solution (PEG) and a lower-volume oral sulfate solution — in people with Crohn's disease or ulcerative colitis who need to prepare for a colonoscopy. **You may be eligible if...** - You are 18 or older with Crohn's disease or ulcerative colitis - You are scheduled for (or about to be scheduled for) a colonoscopy - You are an outpatient (not currently admitted to hospital) **You may NOT be eligible if...** - You have had most or all of your large bowel surgically removed - You have kidney insufficiency, heart failure, cirrhosis, or severe electrolyte imbalance that makes bowel prep risky - You had a colonoscopy in the past 6 months that had to be redone due to poor bowel preparation - You are allergic to either of the prep solutions used in the study - You have toxic megacolon, bowel obstruction, or are too sick to undergo colonoscopy - You are currently hospitalized with severe IBD - You are pregnant Talk to your doctor to see if this trial is right for you.