Robert, i am so sorry to hear this. Is it an acute pancreatitis attack, or does he have chronic attacks!?
I see from the meds he is on, they are mostly anti nausea or antibiotic. I am very surprised they do nothave him on pain meds. this is pretty standard practice, as it can be very painful.
If I were you, I would send Dr Lee a pm on here, and see if he can help you out. I personally dont think it is usually an end of life situation, but I am no vet.