I believe the "anxiety" is a result of the metabolic pathways of
alcohol. Once you stop drinking, the liver no longer is converting ethyl alcohol to carbohydrate (glucose). So that means other avenues of metabolism are then having to work in that regard.

The vitamins are enabling that conversion of metabolism.

Another thing might be happening... you may have an inherited condition called pyroluria. This is not a disease, it is a metabolic error in the manfacture of heme (for hemoglobin in our red blood cells). Pyrolurics have an endproduct that is excreted in the urine, and it is called kryptopyyrole. These pyyroles are harmless except for the fact that they complex out B6 and zinc from the blood, and then these folks develop deficiencies in both nutrients.
Anxiety and alcoholism is the result of this, as serotonin manufacture is impaired.
It is thought that a large % of alcohol abuse may be self medication of this "anxiety" and that being treated with high dose B6 and zinc can help.
Here is an article on it:
http://drkaslow.com/html/pyroluria.html

Understanding of this is more common in Europe where most the research was done, than in US. So American doctors don't look for this, and you have to do this research yourself and ask for the testing. Pfeiffer Institute and others will do the urine testing without a doctor's order...for this reason.

Here are some more things to read:
http://www.everywomanover29.com/blog...food-solution/

http://pyroluriatesting.com/

http://www.thehealingpartnership.org...ia_handout.pdf

People who are detoxing from alcohol, may have carb cravings as a result of the shift in metabolism. I think giving in to these temporarily may help. Chocolate for example is often mentioned.
But in the long run, eating lean protein, vegetables and moderate carb intake will help better over the long run. So try to moderate any "candy or chocolate" until you can feel this metabolic change has occurred.

B-complex, with emphasis on B1, magnesium, essential fatty acids, and a good multivitamin with minerals (including zinc) are often the backbone of detox.