Magnesium sulfate / potassium sulfate / sodium sulfate
"The suprep drink was effective. So effective I was running to the bathroom every 5 minutes for over 4 hours. I'm 29 years old and had my first colonoscopy and endoscopy for abdominal pain. I was so nervous to have this procedure because I heard the prep was awful! After experiencing it firsthand, I have to agree - it was. The drink was terrible. I somehow managed to get the first one down, but when it came time to drink the second one the following morning I puked half of it up. Like someone below said - it was a cherry saltwater hell. I was laying on the floor in my bathroom with the chills. It was probably a combination of no food in my system and drinking the suprep. I hope I never have to drink this stuff again. Ever."