Depends on the level of rapport I had with him. I would try to maximize it first, then try out a "heart-to-heart," pointing out what you've observed in terms of drinking, risks, and that you're very very concerned. Couch everything in extreme empathy and using language that focuses on his safety and well-being. I might point out the shaking, and what I think it means, and include the biggest consequences/risks of going down this road, that of death. I would also use depersonalized language if direct "you" triggers defenses. "I've seen people with problems that become like X." If this kind of approach doesn't break through at all, figure out what your points of leverage are, and work that (can't get meds elsewhere, pressured by someone to be there, you offer something else, other ppl he does listen to who are on your side). Maybe you agree to prescribe WBT only if he's in a recovery program. Those would be my first approaches.