I'm very glad I found this site since it has somewhat calmed my nerves. I took three 5mg Dulcolax tablets as recommended, and within a few hours my body was in absolute agony. 'Abdominal cramping' and 'stomach discomfort' is said to be expected, but that is a serious understatement. I was unable to get off the toilet at first, feeling like my entrails were hanging out of my body. I was actually 'locked' in the position on the toilet in pain, with tears, snot, and drool pouring from my face. Then came the horrible stomach pain, which resulted in me throwing up the contents of my stomach and any subsequent liquid I took for the remainder of the day.
It is now the next morning and I awoke, only to get incredibly dizzy and fall flat on the floor. My stomach cramping seems to be getting a bit more manageable, but I still have pretty bad abdominal cramping and diarrhea. In summary, I seem to have had the same horrible, agonizing reaction as a lot of others have had. I tried Dulcolax for the first time because I saw the 'gentle, yet effective', and was hoping to not get the minor cramping from milk of magnesia...this was 10 times more painful.
Just for information, I want to add that I am an active and healthy (apart from the IBS) 22 year-old male, approximately 6'1", 170lb, and have had many pretty painful experiences in life, but this ranks very close to the top. It felt like what I always imagined drinking corrosive chemicals would feel like. Also, in response to an earlier poster, the vomit was exceptionally acidic, and burned my throat to the point I thought it might be swelling shut at one point.