If you truly believe the professionals are not giving her the treatment she needs you have the option of seeking a second and third opinion (if she will comply with that).
Alternately, have you discussed with them the possibility of having her committed to a facility?
I tend to agree with atalose that they know more than you see and their method of treatment may not be to rush headlong in, healing, therapy, drugs, all take time to work and assess. If your patient is not complying with their treatment (unwilling to give up drinking) they can no more force her to stop than you or anyone else can.
Unfortunately there is no magic wand here.
I say this kindly, I don't know your wife but I don't want anything bad to happen to her either.
Perhaps think what you would want her to do for you if the situation were reversed. Would you want her to have you committed?
Short of that all you can do is what you are doing, getting her treatment and perhaps a second opinion. You cannot save her if she does not want to be saved, unfortunately.