Alcohol can cause long-term changes in the nervous system, and the brain needs time to adjust to a life without booze… It took me awhile to break my two-a-day cocktail habit. But now I never feel the urge to drink, not even when I’m sitting in a bar. That’s not something I could say for the first year of my sobriety. And my indifference toward alcohol has become the best part of giving it up.