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Alcohol abuse encompasses a spectrum of unhealthy alcohol drinking behaviors, ranging from binge drinking to alcohol dependence, in extreme cases resulting in health problems for individuals and large scale social problems such as alcohol-related crimes. Alcohol abuse was a psychiatric diagnosis in the DSM-IV, and has been merged with alcohol dependence into alcohol use disorder in the DSM-5. Globally, excessive alcohol consumption is the seventh leading risk factor for both death and the burden of disease and injury, representing 5.1% of the total global burden of disease and injury, measured in disability-adjusted life years (DALYs). In short, except for tobacco, alcohol accounts for a higher burden of disease than any other drug. Alcohol use is a major cause of preventable liver disease worldwide, and alcoholic liver disease is the main alcohol-related chronic medical illness. Millions of people of all ages, from adolescents to the elderly, engage in unhealthy drinking. Alcohol use disorder can affect people from all walks of life. There are many factors that play a role in causing someone to have an alcohol use disorder: genetics, psychiatric conditions, trauma, environmental issues, and even parental drinking habits. Binge drinking Risky drinking (also called hazardous drinking) is defined by drinking above the recommended limits: greater than 14 standard drinks units per week or greater than 4 standard drinks on a single occasion in men greater than 7 standard drinks units per week or greater than 3 standard drinks on a single occasion in women any drinking in pregnant women or persons < 21 years old Binge drinking is a pattern of alcohol consumption that brings blood alcohol concentration ≥ 0.08%, usually corresponding to ≥ 5 standard drinks on a single occasion in men ≥ 4 standard drinks on a single occasion in women In the DSM-IV, alcohol abuse and alcohol dependence were defined as distinct disorders from 1994 to 2013. The DSM-5 combined those two disorders into alcohol use disorder with sub-classifications of severity.

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