If you are really concerned about saving his life, then you would want him to go to rehab rather than get off scot-free, right? Then again, saving his life is not your job. It's up to you to do what you feel is right. Rehab has no guarantees, especially if it is forced. It just seems a bit inconsistent to be concerned about withdrawal, but not want to 'jeopardize' his 'freedom.'
L