I'm a 59 yr old female, just trying to get psyched up to begin my prep for my first colonscopy tomorrow at 7:30 a.m. I hate to admit it, but I can't believe how frightened I am about it, even the prep!!! The prep solution I was given, which I mixed up this a.m., is PEG 3350/ELECTROLYTE SOLUTION, 4 litres of it. When I do the computation to 8 oz. glasses, that will be 16 glasses of it, and it looks nasty!