I had shingles last year in february, i had the pain and numbness for a few months afterwards,
My Dr gave me gabapentin, but it just made me dizzy,
I was recommended something called Virasoothe,which is for babies with chickenpox,it was a godsend,you can buy it in gel form or a spray, i tried both but mainly used the spray as it meant you dont have to touch the rash,and it really stops the itching, i just took ibuprofen for the pain
I hope something can help your husband, i think people often dont realise how painful it can be