Sodium SulfateEvaluation of an Oral Sodium Sulfate Solution for Patients With Prior Difficult or Incomplete Cleansing

Inclusion Criteria:

1. Patients Age 18 to 80 inclusive
2. Able to read and understand the English language
3. History of poor bowel prep defined as:

• Required extensive washing, as noted in the narrative of the endoscopist report.
• Inadequate preparation
• Endoscopist recommended shorter interval surveillance due to poor prep
• adequate for polyps >5mm but not smaller lesions

Exclusion Criteria:

1. Patients who have inflammatory bowel disease
2. Patients with ileus or bowel obstruction
3. Patients with history of colorectal resection
4. Patients receiving combined upper and lower endoscopies
5. Patients with ascites
6. Patients with previously documented severe renal impairment
7. Unable to provide consent
8. Pregnant or lactating female (females of child-bearing potential will undergo urine pregnancy testing)
9. Patients who have had a recent myocardial infarction(<6months)