title: I recently had a colonoscopy test that showed no polyps. But my doctor told me that I need to have another colonoscopy in the next couple of years because my colon preparation hadn't been thorough enough. Is this common? And what can I do prevent this from happening the next time?
mesh_terms: D002400:Cathartics / Q000008:administration & dosage*; D003113:Colonoscopy / Q000592:standards*; D003681:Dehydration / Q000517:prevention & control; D004326:Drinking; D004573:Electrolytes / Q000008:administration & dosage; D006801:Humans; D013997:Time Factors; D014882:Water-Electrolyte Balance
chemical_list: D002400:Cathartics; D004573:Electrolytes