Bisacodyl
"I should give it a 10 rating for effectiveness. I've been feeling sick yesterday and the doc gave me this to release whatever was in me. I took one pill around 4pm. An hour later, cramps, nausea, diarrhea. Until today, thanksgiving. Every drop of water is just shooting out of me again. I had a banana for breakfast but the pain almost killed me. There is no way I get to eat anything of the thanksgiving dinner today. Thanks!!

So far I've been running to the toilet every 30 minutes, even at night. Thanks again."