Bisacodyl
"It worked for me, I had 5-6 days to go to the toilet, due to stress, depression and bad nutrition. I took 2 pills at 12:00 noon, and the effects started after 5-6 hours, it was ok, and went 4 times to the toilet, normally. No pains, just the normal frustration and a headache. No dizziness, no diarrhea. During these 5 hours, I also drank much water to help the situation. In the past 6 days I almost didn't have meals for the 3 days, (I was sad for being fired). I guess this is psychological. I read many panic comments by other people, saying about strong pain, cold sweats, diarrhea, dizziness, and feeling near to pass out. I had these effects with Laxatol laxative toffees when I was young, so I knew about them all."