my drug of choice gives you a fast ride to the bottom in your external affairs, but even at my lowest(no money, stealing, etc..) due to the specific drug, it was the emotional bottom of hopelessness, despair, couldn't live with or without my drug, sick and tired of ME that preceded change. i don't think that has to be a substance specific thing.
your husband certainly seems to exhibit the classic narcissistic, ego maniac with inferiority complex, manipulative addict traits. only he can change when he decides he wants to. whether you're around for that is a decision only you can make. i wish you all the best.