Originally Posted by CDSmith

Hospitals here use something called "Golightly"..... I know, .... the name is retarded...It makes you go anything BUT lightly :D It comes in 1 litre bottles, looks like water but has a bit of a vile taste that takes getting used to. A 4-litre pack, if drank over the course of about 24 hours, will clean you right out top to bottom, literally.

Ask at a pharmacy for it, or at least describe it to the pharmacist.. they should have something like it where you are.