Magnesium sulfate / potassium sulfate / sodium sulfate
"28 year old, first colonoscopy prep. 



even though it tasted gross, it was the worst part about it. I started drinking a lot of water the day before the prep (didn't eat less though). Took 3 laxatives the night before as instructed by my doctor the night before as well.



took first round at 5pm. Took the whole hour to drink plus the 32oz of water. Felt really full & had to try a little not to throw up due to the sweet/salty taste. But I took my time.



second round at 10pm. Was easier to get down (maybe I was more prepared for the taste).



the thing I was most worried about was cramping and I had none. So that was cool."