Magnesium sulfate / potassium sulfate / sodium sulfate
bowel preparation
"Since my father and his sister both passed away from colon cancer, I have to have this colonoscopy now (just turned 40).  I drink the first bottle at 5pm and it wasn't nearly as bad as I thought it would be...went down easy.  I immediately sat on the toilet out of fear but nothing happened until 6:20pm (it's 6:45pm now).  It hasn't been steady either but when it comes, it's pretty much like I'm peeing from my butt.  It already looks pretty clear.  So, hopefully, I'll be getting up soon.  Not looking forward to the 4:30am morning dose but I am looking forward to eating.  I'm starving!"