Brenda,

The overmedication can be casued by depression. Radiation can do that. I was very depressed after my treatment.
I was exaclty the opposite. I refused to take my pain meds and made everyone's life around me a living hell. My wife talked to my doctors and they had a sit down with me to straighten me out.

I think you have to make the call. Tell your doctors whats happening.
They at the very least will point you both in the right direction.

Even though you are a proffesional care giver, it doenst make seeing you loved one suffer any easier. Talk to the docs. Let them be the ones to tell him to get back on the horse. Make them the bad guys so to speak. You dont want him to have to suffer through withdrawl on top of what he has already been through.

Drop me a line if you need to talk.

Take it easy.
Robert