constipation, drug induced
"I have been on opiates for chronic back pain and DJD for more than 15 years.  I have always had bowel issues, even before being on pain meds.  So adding more meds made it nearly impossible to evacuate completely.  For years I have been taking 6 or so prescription and otc laxative meds per day with very poor results.
A year ago, I was so backed up that I was vomiting repeatedly.  Long story short, after the ER doc checked for obstructions, he gave me a shot of Relistor and sent me home.  15 minutes later, when I got home I had to rush to the bathroom.  First complete 'normal' evacuation in years.  Too bad my pc won't prescribe it for me to take when needed."