Alcohol is a drug, specifically a psychotropic central nervous system (CNS) depressant). It is the active ingredient in fermented drinks such as beer, wine, and distilled spirits (hard liquor) ). Ethanol is the chemical name for alcohol, and it is a simple alcohol with a molecular formula of C2H6O). Alcohol is one of the oldest and most commonly consumed recreational drugs, causing the characteristic effects of alcohol intoxication ("drunkenness") ). It is both physically and psychologically addictive, and alcohol addiction is a chronic disease characterized by uncontrollable seeking of alcohol, as well as drinking that is compulsive or difficult to control, despite harmful personal or professional consequences.