Magnesium hydroxide
constipation
"I suffered from diverticulitis 15yrs ago. Had to have part of my sigmoid colon removed after it perforated, almost died from the infection.Things went well for 7yrs, until I had to have surgery again because of blockage due to stomach adhesions. Which they say is typical after that kind of  surgery. In each of these incidents I was unable to poop and my stomach grew to the size of 2 watermelons! It was so painful. Well it happened again!  I couldn't pass anything but a few hard marbles for 2wks! The pain and gas were horrible! I tried everything, Senokot, prunes, etc. I was getting really scared that what was left of my colon would explode and I would die! I took a dose of MOM and walla It worked! 
Be near a toilet for several hrs though!"