Boomer, I can really feel your frustration. Do you have help? Also, you might bring up to the doctor adding Xifaxan, though it is really expensive and you'll probably have to fight with your dad's insurance to pay for it. It clears out bacteria in the GI tract which could go to his brain, so it does help with confusion.
Imp, good to hear that you've had such an improvement. I think Boomer's dad may be past the point where he will turn around like that, but there are always miracles.
Hugs,
Connie