constipation
"I took 1 tablet of Dulcolax late at night before bedtime (11:00pm) because I hadn't passed a bowel motion in 4 days. Everything was fine until about 5:00am. I woke up with nauseating cramps and felt like I had food poisoning. I have lived with irritable bowel syndrome for years, so for me to say that...the pain has to be pretty bad. Within an hour I pretty much emptied my entire colon, and it was not a pleasant experience. I would "go" multiple times with in-between periods of intense cramping where I'd have to lay down on the floor.

However, I've read other reviews and found that while some people had a similar experience to mine, others didn't at all. I did feel fine afterwards. Next time I'll definitely be taking half a pill instead of a whole!"