Alcohol is a legal, controlled substance that lowers anxiety and inhibitions. It also has a broad range of side effects, from loss of coordination to slurred speech. Not everyone who drinks is an alcoholic, but anyone whose life is negatively affected by alcohol on a consistent basis is considered to have an alcohol use disorder. Alcohol is commonly consumed as a drink in various forms, including beer, wine and hard liquor.
While substance use disorders are often the first to come to mind, addiction exists in many forms, including behavioral addictions.