Magnesium sulfate / potassium sulfate / sodium sulfate
bowel preparation
"I was optimistic when I started.  It tastes horrible but you can get it in.. The first dose a way.  Within 10 minutes the cleanse had begun and for that piece wasn't bad.  What made it hard was the intense nausea that has lasted the past 4 hours and emerging headache.  If this nausea doesn't ease I won't be able to hold down the second dose come morning."