welcome sometimes a dog will allow him to be alone
he does seem very selfish and this can happen with severe anxiety sufferers, the best meds usually are an antidepressant, but he may need to try several at different doses in order to find 1 that works for him, and valium type meds as needed, are you sure he is actually taking his present meds?
the panic attacks wont kill him or even harm him and you need to constantly remind him of this
you might try to shock him into trying to recover by saying that you didnt marry him in order to become his full time psychiatric nurse, he needs to summon up enough courage to start the recovery steps advised to him, extra valium always helps this
recovered former longtime anxiety and panic attack sufferer and helper of other sufferers but no training or qualifications in medicine or psychology, any remarks that may be taken as advice must be confirmed with doctor or other health professional