Kelly, this is tough...
most of us are not doctors and we don't give medical advice. It is not that we don't care because we do. It's just that you are asking for medical advice about what sounds like a late stage alcoholic.
I would suggest that if you are even remotely rational you already know what you have to do. If so, do it. If not, then turn him over to your higher power and what will be will be.
Take care,
Cyranoak