constipation, drug induced
"First dose worked great. Then comes horrible pain. I only use in dire straits when it's been 5  days and nothing else works. Sometime it takes days for Movantik to even kick in. That's what made me find this board, it's been 3 days this time and it hasn't worked, but I haven't had any stomach pain. My pain experience doesn't sound as bad as some of yours. Try heating pad on stomach. Or my joke, just stay full of poop! It feels better!"