Please go to a treatment facility (volunteer please) and talk to the patients there. It is beyond eye opening, I volunteered at one myself. I've seen pain medicine literary ruin lives, and it's so sad. These are people who have been through hell with their injuries, some of the worst I've ever seen, and then they go through hell again with the opiodes.
They can work on a long term basis for SOME (but not the majority) of patients.
Psychological treatments are also an important part of pain management.