Good morning Red!...and welcome!
I'm sorry your husband is going through so much in the way of health issues and pain. This is a great forum for support, and I'm glad you found your way here.
A couple of suggestions on over the counter supplements...might be "Cucurmin" and maybe..."Cobroxin"...and yes they are OTC supplements. I see that you are using the catsclaw (devils claw)...and I too have tried those. Not with much luck though.
I do however, agree with Matt here, in that your husband may be better off being treated by a PM for his pain issues.
Also...has he tried a "Tens" unit? It may help a little...and look for "Biofreeze" as well. While it is not for deep tissue, it may take his mind off some of the pain, by the way it reacts to the skin.
Good luck, and please keep checking here for more suggestions. as the weekends can be a little slow here on the forum.
SE