Not to be ornery, but everyone is truly different.
I went 7 years with no diagnoses, then it quickly went full body. Along with TOS, four herniations, TBI, and a few other 'delights', I've been on this train for more than 27 years.

I've been put on Methadone about 20 years ago, and was told to think of it like (BP medication), I'll probably be on it for life. (Before that, I was on other lesser 'strong' meds, that made me feel 'buzzy' and foggy. Not good!

Over the years, and with the 2nd accident, my dose has changed, but, I'm now at half the highest point. I do take a 'cocktail' with Cymbalta, diazepam, zanaflex(at bedtime), and migraine meds.
For me, Methadone is the ONLY thing that has ever controlled 'The Burn'.
I was raising two children, and running two business'.
I hadto have relief! And, even with methadone, I still needed breaks during the day..

I suppose it depends on your own body, what you need to do, and how often you can just sit still, along with the severity of the injury. We all react differently.

Just so long as your life is liveable, and the pain doesn't drive you into depression, I say OK! God Bless All!

Be Well,

Pete
asb