The prep is worse than the procedure

Split dosing and some new liquids may make the bowel cleansing needed for colonoscopy a bit easier and perhaps more palatable.

For many people, the main problem with colonoscopy is not the procedure itself, which is experienced in sedative-induced oblivion, but what comes beforehand. Bowel preparation — or, simply, "the prep" — typically involves drinking about a gallon of a foul-tasting solution that provokes diarrhea and then a marathon session on the toilet.

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