Each ColonLYTELY sachet, when prepared as directed, produces a one-litre solution that promotes bowel cleansing while maintaining fluid and electrolyte balance. A 4-litre preparation of ColonLYTELY is considered the gold standard for bowel prep efficacy. Known as Kleanprep®, Kleenprep, or Klean-prep® in Australia, ColonLYTELY is used to cleanse the lower bowel before endoscopic, barium enema, X-ray, or surgical gastrointestinal procedures.