Dulcolax
"I took the medicine version of dulcolax, at around 8pm, and I have found it works ALOT better than the tablets do! I woke up at 5am with severe abdominal pains and really was in agony, but I'm managed to go to the toilet and feel a lot better, a bit sick though. I'm rating it a 5 because yes it does the job, but the pain can get unbearable and I'm only 16, go to your doctor and ask him for painkillers to go along with the tablets, he gave me a special kind that matched the kind of laxative, only problem was they didn't agree with me and made me throw up, may be different for others tho!!"