Regardless the origin of the craving, which is the underlyinmg state, you can give Strophantus mother tincture in 20 drops in a galss of water and the person will never drink again. Then you can address the underlying mental state and cure him. Otherwise, like with Lachesis, he would antidote it by drinking alcohol. Clarke has an intersting piece on this. I have followed and never seen it fail.