What bowel preparation is needed for colonoscopy?
If the procedure is to be complete and accurate, the colon must be completely cleaned, and there are several colonoscopy preparations . Patients are given detailed instructions about the cleansing preparation. In general, this consists of drinking a large volume of a special cleansing solution or several days of a clear liquid diet and laxatives or enemas prior to the examination. These instructions should be followed exactly as prescribed or the procedure may be unsatisfactory (visualization of the lining of the colon may be obscured by residual stool), and it may have to be repeated, or a less accurate alternative test may be performed in its place.