Colonoscopy prep involves avoiding alcohol or certain drugs a week before and emptying your bowels. This eMedTV Web page discusses preparation measures, including a description of a bowel prep and tips for post-procedure follow-up.
The process of cleaning out your bowels before a colonoscopy is called a bowel prep. This eMedTV segment describes the steps involved in this procedure, including which medicines are often used and what to expect after taking the drugs.
There are a few ways to do a bowel prep; using Fleets Phospho-Soda is a popular method. As this eMedTV article explains, using Fleets Phospho-Soda (a laxative) involves taking the drug in 2 separate doses, accompanied by lots of water.