Your husband is with the wrong providers! GET HIM OUT OF THERE! But, be sure he has a supply of meds. Find a good Neurologist that deals with RSD. You've had some good recommendations here.
I got RSD when I just turned 27, and that's half my life ago.
It took me 7 years just for a diagnoses! They just didn't know what it was back then.

But, everyone here, is correct. Your husband, Sam, is with the WRONG doctor!

I think a good RSD lawyer, might be of better help! (tongue in cheek, not to sue, but someone hasto have a better knowledge of RSD, than this doc that you're using!)

I wish you the best, and my prayers!

Pete
asb