opioid-induced constipation
"I have to take daily opiates due to chronic back pain despite three back surgeries, including lumbar fusion. I tried everything but always would ultimately get backed up. I tried Movantik at one point a couple years ago, but it gave me bad stomach cramps, so I quit. At that time, I had some partial impaction.  I recently did a magnesium citrate flush, like prepping for a colonoscopy. I then tried Movatik again and have a bowel movement within an hour or so. I do get some stomach cramps but only for 1-2 hours. Taking 1-2 doses of Miralax a day can help if stool is hard. The big negative is cost."