I take rather large dosages of opioid pain meds. I do pay attentuon to the GI issues associated with the treatment, and it is manageable. Everyone is different of course but a solutuon is usually availiable to those of us dealing with real chronic pain issues like yourself and in need of opioid treatment.
I use a double dosage of miralax per day as a minumal starting point. Avoidance of certain food groups helps a great deal, the food maybe inside you for longer durations. Additional stool softners can also be included as needed.
Hope you find a good solution that allows you to not give up your CP quality of life options.
Opiates reduce peristalsis in the bowel. In some cases this cause the need for a bowel resection and colostomy. Treatment is naltrexane, but withdrawal is very difficult and painful so this is done under anaesthetic in a hospital.