Substance use disorder

Disorder characterized by continued use of a medication or a non-medically indicated drug or toxin, resulting in repeated adverse social consequences related to use of the substance. Social consequences include failing to meet work or school obligations, poor relationships with family, interpersonal conflicts, and legal problems. The main disorder categories are substance abuse and substance dependence. Substance abuse is typically defined in terms of the social consequences of substance use, and substance dependence is typically defined by physiological and behavioral symptoms of substance use. Measurement depends on the data source. Many sources reference the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV) or the ninth or tenth editions of the International Classification of Diseases (ICD-9 and ICD-10).