Moviprep consists of two packets of powder, which are dissolved in water to create a laxative. It is primarily used in preparation for a bowel examination. Moviprep is a prescription drug used to clean out the intestines before certain bowel examination produces such as barium enema X-rays or colonoscopy. Moviprep belongs to a class of medications known as laxatives. Moviprep works by drawing large amounts of water into the colon. Doing so results in watery bowel movements that help clear the stool. Clearing the stool from the intestines enables the doctor to examine better the intestine during your procedure. You may have to adhere to a special diet before using Moviprep. Ask the doctor about the foods and liquids you may eat or drink before the procedure or the exam may need to be repeated.