Bisacodyl
"I took it before going to bed 11pm and woke up around 3am with excruitiang back pain and stomach pain. I was literally on the floor breathing like I was in active labor. The pain was getting worse by the second and then I started sweating so badly that my pj's and hair were literally soaked and it was dripping off of my face and chest. I couldn't tell if I was going to throw up, poop or if I was having a legit heartattack. I couldn't even yell for help to my sleeping husband because I was in so much pain. I was honestly scared at this point because I've taken Exlax and never had this sort of reaction. I started to push and massage my abdomen which helped alleviate a little bit of the pain/cramping that I was having."