Okay, just going back to your first reply (now knowing you are in the UK). Yes, most GPs will not get involved with alcohol problems, they don't see it as coming under their remit and the budget doesn't come to them - they are quite mercenary over money. At best, they would refer her to an ARC (addiction clinic) and by doing that, they have covered themselves.
I understand your feelings about ARCs, I went to two of them myself and the staff have no knowledge or understanding and are of a low calibre. Their standard advice seems to be, keep a drinks diary, to which I would say, I don't need a diary, I can tell you exactly what I've had.
As for not eating, the reason for this is, the carbs in alcohol are easy for the body to grab, so it always goes for those first. The downside of this is, that they are not getting vitamins and nutrients, only carbs. This is compounded by the fact that the very important vitamins (vit B) or water soluble and get flushed out, plus many heavy drinkers have gastritis (inflamation of the stomach lining) which impedes the absorption of them.When people don't get these vitamins, they can start to have short term memory loss and have trouble concentrating. Long term it gets worse, but people who drink heavily have no appetite.
Now, the reason she continues to drink, is not that she is lazy or feckless. The alcohol has changed her neural pathways and receptors. A drug has done that (alcohol) and a drug (medication) is needed to undo the changes that have occurred.
There are two main types of medications that work in slightly different ways, but have the same effect of relinquishing this hold alcohol has. There are two small obstacles, but in the grand scheme of things, they are worth overcoming. One, people have to want to give up, somebody helping them is immense benefit, but they do have to want to. Quite often with people there is a triggering point that gives them the spark. The second, is that the medication would need to come through the ARc (addiction centre) and all that is rquired there, is the ability of when someone says 'the computer says no', you can go, I know my rights under the NHS and I am entitled to see the doctor - the only thing they will (and can) insist on is that your partner has a blood test prior to seeing the doctor.
If you want to go down this route, Joanna and I can help advise you, myself having had the experience of having been through two and obtained the medication and Joanna knows all the legal, rights and what stuff to print off and put in front of them. If you think you want to go down that route, then we can discuss the two medications and which one you feel may be best suited.