Polyethylene glycol 3350 with electrolytes
"26-uk-So the reason I gave 5 is cause I'm currently taking the 1st L. Disgusting, since 7pm I haven't managed to finish the last 4 glasses as I would just wanna throw up and I really need this medicine to work as I have got a colonoscopy tomorrow.  Two months ago I was hospitalized for diverticulitis, so now I really need to get passed this examination, until 9pm I managed to drink almost everything, but didn't have any movement, I thought the solution wouldn't work.  Then at 10pm when it hit me ! Still didn't finish to go toilet and like the others said its literally like peeing out of your bum. No unbearable cramps though."