Dulcolax
"I am getting ready for a colonoscopy and I am taking these two days prior. I was thinking since I have problems with constipation I would take 2 with dinner and then I took 3 before I go to bed. I woke up in the most painful cramps and have been peeing out my butt for 3 minutes. I would recommend not taking more then 1. I was stupid because I thought it wouldn't help. Wow was I wrong."