Diagnosis of a mental, emotional or behavioural disorder by mental health professionals is mostly conducted using criteria in the Diagnostic and Statistical Manual of Mental Disorders (DSM-5), published by the American Psychiatric Association.
Diagnosing drug addiction (substance use disorder) requires a thorough evaluation and often includes an assessment by a psychiatrist, a psychologist, or licensed alcohol and drug counsellor. Blood, urine or other lab tests are used to assess drug use, but they’re not a diagnostic test for addiction. However, these tests may be used for monitoring treatment and recovery.
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