Alcoholism is a chronic disease characterized by craving alcohol and continued drinking despite negative consequences. It involves both a physical dependence on alcohol and other genetic, psychological, and cultural factors. Symptoms include drinking alone, blackouts, withdrawal symptoms, and inability to control drinking. Effects include physiological harms like injuries, ulcers, and liver disease as well as psychological, social, and economic impacts. There are different subtypes and levels of alcoholism from hazardous drinking to physical dependence. Prevention strategies aim to reduce access and promote education, treatment, and support groups.