Polyethylene glycol 3350 with electrolytes
"have a colonoscopy at 7am tomorrow. This is my 2nd time using PEG3350 and this time I made a schedule.  Started on the hour, then every 20 mins another 8oz 
glass.  I used a straw while holding nose! Don't let go of nose until glass is empty.  I had a small capfull of listerine waiting-- and gargle after every cup you drink! Works like a charm!! After 5th cup the runs will begin! Then don't leave the bathroom-- except to drink every 20 mins!
Happy pooping! "