bowel preparation
"Certainly did the job, but boy howdy was it hard to get down and keep down.  Take the first dose and then spend the next two hours in the bathroom - not just near it!!    Second dose also kept me "going" practically up to the time of the procedure.   Sip water (or something, anything!) in between gulps of the medicine - it'll go down easier.   Rated 4 because it was effective, but pretty nasty."