I've had RSD/CRPS for many years. Started in my left arm, has spread to upper torso and face, and left arm. I was on morphine for a few years until my new pain specialist took me off of it and put me on ketamine. The swelling went down some, the rash has almost disappeared, I still have discoloration but the burning is gone. The spread of CRPS has not stopped but I am real thankful for the ketamine. It works for me and others, but some folks don't have as much luck on it. I think the morphine actually made the symptoms worse.
Just thought I'd throw this in.