Magnesium citrate
"So Friday I had noticed that I was a bit stopped up, and I had the same kind of pain you have when you know you just gotta go (poop). I had never been constipated before, but I sort of gave myself a self-diagnosis, and decided that constipation was indeed my problem. The following Tuesday after nonstop aches and pains in my stomach I decided to go to CVS and buy a stool softener. That didn't really work very well on me, as a stool softener only works on the stool that has yet to be produced(it doesn't help with the current blockage). Finally, I decided to go to the doctor, where I was prescribed Magnesium Citrate. This stuff works miracles! It tastes very sour, but kind of like sprite, and I took it at 3 and evacuated my bowels at 7."