Comparing 4L Golytely to 2L Golytely With 15mg Bisacodyl Regimens for Inpatient Colonic Preparation

2L Golytely and Oral Bisacodyl 15 mg Versus 4L Golytely Regimen for Inpatient Colonoscopy Bowel Preparation: A Randomized, Non-Inferiority Open Trial

The investigators wish to compare the efficacy and patient tolerability of a preparation consisting of 2L Golytely (PEG + electrolytes) plus 15mg of bisacodyl vs the standard preparation of 4L Golytely. The investigators hypothesize that 2L Golytely with 15mg bisacodyl will show similar bowel cleansing efficacy while offering better tolerability.

Inclusion Criteria:

• Inpatients undergoing colonoscopy
• Age 19 or over

Exclusion Criteria:

• Unable to provide informed consent
• Patients with constipation
• Patients with suspected bowel obstruction or severe inflammatory bowel disease
• Same-day colonoscopy
• Intensive/critical care patient
• History of colorectal resection