Bisacodyl
"I hadn't had a proper BM for about 2 weeks. I Picked up Dulcolax sensitive and took 2 pills at 10pm, at 2.38am the cramps started. It started with the worst cramps I've ever experienced together with intense nausea and vomiting, cold sweats (to the point my fingers and lips were blue) and terrible shakes. By around 4am I had my first BM which was significant and I then spent until 1.30pm continuously on the toilet simultaneously vomiting and having diarrhoea. It's now 4.30pm I can't even take a sip of water without vomiting, I'm still having painful cramps and I feel extremely weak. I would never recommend this medication to anyone, no matter how 'effective' it is."