“If my son suffered from alcoholism to such an extent, then I would have forcibly sent him to the doctors a long time ago. Let him lie on IVs for months in the hospital until he clears and gets rid of the addiction to a greater extent.”
As far as I’m concerned, there is no other way out. After that, you can already start a dialogue with him. His rehabilitation will consist of taking anti-depressant drugs, perhaps some very soothing herbs and teas. For example, I’m always drinking kava when I feel too emotionally unstable.