I really have no idea. I don't think many pdocs are progressive enough to try this yet, but the book brings up some interesting points and discoveries...

"The Opiate Cure tells the stories of painful people whose mental illness were relieved when they were given opioids for their chronic pain. This improbable outcome has occurred in those with bipolar depression and mania, attention deficit disorder, post-traumatic stress disorder (PTSD) obsessive-compulsive disorder (OCD), and narcolepsy. These several diseases are now linked together, constituting the bipolar spectrum. Linked also to bipolar spectrum is chronic pain in its many forms, including migraine. This book will clearly demonstrate that bipolar spectrum is uniquely responsive to opiate therapy. The Opiate Cure offers new insights and, more importantly, hope for those with acute and/or chronic pain."

I also noticed the same improvement, while being treated for severe pain at one point in my life. The problem is finding a drug where the patient doesn't develop a tolerance very quickly. Maybe sometime in the future. Who knows?
If anyone is curious about any case studies, take a look at the Author's website:
http://www.understandingpain.com/the-opiate-cure.html

Sent from my iPhone using Tapatalk