Movantik
"Negative and potentionally dangerous experience. All Movantik did for me was give me gas and painful cramps all day/night. For the entire 2 weeks I took it I did not have any BM. Thankfully I was switched back to my regular OIC medicine and could make.  If I would have continued to take Movantik, I was running the risk of a serious blockage being created from that medicine, so I strongly recommend that if this does not work for someone within 14 days to immediately consult a doctor!"