Polyethylene glycol 3350 with electrolytes
"I've spent many hours reading all sorts of horror stories on MoviPrep.  Here's mine (I'm currently on the final glass of the 2nd dose).  Two days before procedure I ate very lightly.  Yesterday, I ate nothing, but did drink lots of fluids including Gatorade.  Drank the first 32 oz at 6 pm.  Took me 1.25 hours to get it down.  Tastes yucky, but not THAT bad.  Results started pretty much right after that and I stayed in the toilet for a solid hour or more.  It didn't hurt, just a little uncomfortable and some tummy gurgling.  Went to bed and got some sleep, but woke up feeling a little nauseous.  Then I had to get up at 3:30 to do my 2nd liter.  Almost done now.  We'll see if all goes well at appointment."