I've been doing this medical stuff for a long time, going on 10 years now, and the general consensus, and what we tell our patients is.....if you are truly in pain, the chances of addiction (physical) are pretty low. Therein lies the rub......too many patients develop this fear of experiencing that pain again, and they develop a psychological addiction. Thus, even tho their injuries may heal, and there be no physical cause for pain, their mind/psyche creates pain.....then they are hooked, sometimes for life.
I've seen a lot of folks with severe injuries who took a PILE of pain killers come out with no addiction.......and I've seen folks with relatively (to me) minor injuries get hooked in a heartbeat on low doses of painkillers.
Regardless, hats off to Jackal........you are a true friend, sir, and I you for attempting to help your friend get that monkey off his back. Too many "friends" look the other way and just let someone destroy his or her self.