If you can catch your husband before he gets too lit up, talk to him from the bottom of your heart without reservation. Tell him how much you love him. Tell him you are terrified for his safety and altough you under stand that he cannot imagine quitting drinking , that you would like to see him try to find another way. Chances are you have tried this route already....
Drugging another individual without their knowledge and consent is not only irresponsible it is illegal. Let that be the last time you allow yourself to take that route.
Suggestion... try contacting ALANON.