MoviPrep is a laxative solution that stimulates bowel movements. This medication also contains minerals to replace electrolytes that are passed from the body in the stool.MoviPrep is used to clean the bowel before colonoscopy, a barium x-ray, or other intestinal procedures. MoviPrep cleans your colon by causing you to have diarrhea (loose stools).Cleaning your colon with MoviPrep helps your healthcare provider see the inside of your colon more clearly during your colonoscopy.