Magnesium sulfate / potassium sulfate / sodium sulfate
bowel preparation
"Whoever said this was not bad is nuts! This was awful I gagged through the first bottle. I've been on an all liquid diet the morning of and took my first dose at 6:pm it's 9:30 and it still has not worked. My stomach however is nauseous and I have an unbelievable headache. I'm dreading the next 16 oz. the thought of having to drink it is making even more nauseous! You would think there would be a pill that would work just as well, especially since I can't stomach this nasty concoction!"