Preventing drug abuse and excessive alcohol use increases people’s chances of living long, healthy, and productive lives. Excessive alcohol use includes binge drinking (., five or more drinks during a single occasion for men, four or more drinks during a single occasion for women), underage drinking, drinking while pregnant, and alcohol impaired driving. Drug abuse includes any inappropriate use of pharmaceuticals (both prescription and over-the counter drugs) and any use of illicit drugs. Alcohol and other drug use can impede judgment and lead to harmful risk-taking behavior. Preventing drug abuse and excessive alcohol use improves quality of life, academic performance, workplace productivity, and military preparedness; reduces crime and criminal justice expenses; reduces motor vehicle crashes and fatalities; and lowers health care costs for acute and chronic conditions.