constipation, drug induced
"Wow this drug gets your GI tract moving.  Daily opioid user for chronic pain and constipation was becoming such a problem, I gave in and got some samples from my Dr.  2 hours later relief!  THE NEGATIVE REVIEWS HERE claiming pain and cramping.... yes after immobilizing your bowels with opioids for extended periods giving them a kick in the pants isn't going to feel good (but it will clean you out)"