When I was drinking I had really severe cravings and couldn't go for more than a day or two without picking up.
What's really helped me is taking the nutritional supplements Kudzu (an herb used for alcoholism in traditional Chinese medicine) and L-Glutamine (an amino acid). Back in November I started taking about 1000 mg of each 3 times a day and within a week my cravings had lifted enough for me to be able to resist drinking and start working on a plan for long-term sobriety.