bowel preparation
"Seriously - as others have said, DO NOT WORRY about this exam.  I get nauseated really easily and worried about the effect of this stuff.  The worst part is the volume of fluid you have to drink and then psyching yourself up to doing it a second time.  No pain, only some full feeling nausea for about 20 minutes after drinking but it passed quickly.  Worked in about an hour and kept working for a few hours - stay on the toilet and minimize wiping.  Use babywipes as much as you need.  Rinse, repeat. The test is a joke, this is by far the worst part, and I've had indigestion that was far worse than this."