He is probably "out of it" due to ammonia in the blood, which causes encephalopathy (basically a form of dementia). My husband suffered from severe mental confusion for several weeks, though it eventually improved. As you will discover, if you read MG's thread, my ex had early cirrhosis, as it turned out (though the doctors predicted he would need a transplant--IF he lived)--he would be fine if he quit drinking. Sadly, he went back to it, and that's when I finally had to leave him.
Keep posting here. You will get a lot of emotional support. I also highly recommend Al-Anon. It kept me from losing my mind from dealing with all this stuff.