There are many different preps now for a colonoscopy. My most recent colonoscopy prep did not include the gallon of sodium phosphate (golytely, fleet, etc). I actually took the Visicol tablets which are a little big and you do need to take a lot however much better IMO than the liquid preps. For any colonoscopy prep you need to make sure you are replenishing your fluids continuously so you don't get dehydrated. Hope this helps a little.
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