Colon cleansing of residual stool and secretions during colonoscopy

A method for cleansing the colon of a subject during a colonoscopy screening procedure, comprising during the colonoscopy introducing into the lumen of the colon of the subject, through a channel in a colonoscope, a liquid form of a composition comprising:

• a) N-acetylcysteine and one or both of
• b) simethicone or
• c) a docusate salt,
• wherein the amounts of a), b) and c), are effective, when administered through a colonoscope, in two or fewer flushes, to cleanse stool from the colon of the subject such that a region of the colon in the visual field of the colonoscope contains substantially no adherent stool or intestinal secretions, and
• wherein the concentrations of a), b) and c) are
• a) N-acetylcysteine:
• from about 20 mg to 20 g/L,
• b) simethicone:
• from about 3 mg to 3 g/L,
• c) a docusate salt:
• from about 2 mg to 2 g/L.