His mom helped, and it didn't keep him from dying. Sadly, these last few years probably took a lot from her life, too.
He will do what he will do, no matter what YOU do. I take it that "screwdriver" was a pre-mixed drink, if you knew the proof? Something that is "25 proof" is only 12.5 percent alcohol. He probably drank the jug of wine.
I dunno, Chicory. How much more of your life are you willing to give up, with no sign that he wants to recover?