Answer:A substance use disorder is a medical illness characterized by clinically significant impairments in health, social function, and voluntary control over substance use.2 Substance use disorders range in severity, duration, and complexity from mild to severe. In 2015, 20.8 million people aged 12 or older met criteria for a substance use disorder. While historically the great majority of treatment has occurred in specialty substance use disorder treatment programs with little involvement by primary or general health care, a shift is occurring toward the delivery of treatment services in general health care practice. For those with mild to moderate substance use disorders, treatment through the general health care system may be sufficient, while those with severe substance use disorders (addiction) may require specialty treatment.
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