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How does the number of symptoms help determine the severity of a substance use disorder?

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drug use The use of psychoactive drugs, such as pain medications or illegal substances, often results in emotional, physical, and social harm.

The severity of a substance use disorder is determined by the number of signs or symptoms an individual exhibits within a 12-month period.12

Medical professionals use this count to categorize the disorder into different levels of severity:2

Mild: Generally diagnosed when an individual presents with two or three symptoms.1
Moderate: Typically indicated by the presence of four or five symptoms.1
Severe: Diagnosed when an individual exhibits six or more symptoms.1

These symptoms include patterns such as difficulty controlling substance use, persistent cravings, continued use despite harmful consequences, and significant interference with daily activities and responsibilities. Because substance use disorders can profoundly undermine an individual's physical and psychological well-being, accurate diagnosis based on these criteria is essential for tailoring effective treatment, which may include detoxification, behavioral therapies, and medication.12