Naloxegol
"I have been on opioids for over 10 years and have always had a problem with constipation.  I have used several over the counter stool softeners which rarely worked. I could sometimes go almost a week before having a bowel movement. I continue to live with this issue until my doctor recommended'Movantik.  He provided me with samples which I started immediately.   This drug is a miracle!!  i have had a BM almost every day.   I have not had any side effects and I feel great"