Meredith,
I am sorry for the trouble and anxiety DH has surely caused you and your/his family.
I think the only thing you can do is to try to impress upon him (while sober) the impact of his choices. Tell him what it's doing to you. Tell him you're not willing to take it anymore, if indeed you are not. And then follow through.
In the final analysis, each of us is responsible for our own choices and we cannot rescue anyone. Sad, maybe, but true.
You need to stand up for you. This is the good, right and moral thing for you to do.