Welcome to healthcare Magic!
Sizodone is a drug primarily meant to treat psychoses
It has shown good response in your husband's case, I must congratulate that your husband is almost free of alcoholism
Before you stop the drug note one thing that it should be tapered slowly rather than abruptly stopping it.
Another important point is that you should try to modify his company, a bad company can again cause him to fall prey of his habit.
Change/transfer his job if possible.
Motivate him to have regular exercises and gain heath.
Going to religious place of worship would also soothen his mind.
Wish you a great health!