My nick is Nicotinic Acid, Vitamin B3. There's evidence it helps with alcohol cravings. Take 500mg, it will start a heavy "flush", it feel like swelling, and it'll be about 20-40 minutes before it calms. Eventually after a few weeks or so your body will normalize and it won't cause a flush anymore. This means the deficiency is cleared, perhaps then you won't have cravings, hopefully.