Bisacodyl
constipation
"Dosage for adults says 1-3 pills.  I'm 27, 130 lbs, hadn't gone for almost two weeks and was starting to feel full even when I didn't eat and extremely bloated.  I only took one pill because I didn't want severe cramping.  7 hours later, after a lot of rumbling and mild cramping I had to "go".  Intense cramping during going, my knees were shaking and I vomited three times as well.  This certainly works, but I also felt like I had a severe stomach virus for about the 30 minute duration.  This was from one pill.  I couldn't imagine taking 2 or three.  Everyone's bodies react differently, but I will be going the enema route next time."