Magnesium sulfate / potassium sulfate / sodium sulfate
"I don't know why everyone is taking their doses so late. My doctor said to take at 12 and 5. Last time I did this I was up all night and was not going to do that again. I took my first dose by using a straw and drank all at once then drank water immediately after wards.  It took effect 30 minutes later and was on toilet for 2 hours straight. I had my i-pad, phone, petroleum jelly so decided why try running to bathroom every few seconds. Took 2nd dose at 5 and everything was same as first one only this time I was a lot more raw. Did get the chills on the second dose for awhile. Its now 7:30 and hopefully things have slowed down and I can get a good nights rest and get this over at 7:45 tomorrow.  Craving a cheeseburger and fries."