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advancedsubstance-induced mood disorderalcohol use disorderdifferential diagnosisdual diagnosis
A 47-year-old male presents to the psychiatric clinic reporting 3 weeks of depressed mood, anhedonia, insomnia, poor concentration, and passive suicidal ideation. He discloses heavy daily alcohol use (12-15 standard drinks per day) for the past 2 years, with his last drink 5 days ago. He has no prior psychiatric history before the onset of heavy drinking. Review of prior records confirms no depressive episodes prior to the alcohol use escalation. His BAL is 0.00 and he shows no signs of withdrawal. The most appropriate initial diagnostic consideration is:
Explanation
When depression and substance use co-occur, the essential clinical determination is: primary or substance-induced? Three questions guide this differentiation: Did mood symptoms predate the substance use? Do they persist well beyond expected withdrawal? Is there a history of mood episodes during sober periods? If the answer to all three is no, the substance-induced diagnosis is appropriate, with reassessment after 2-4 weeks of abstinence.
Key Takeaway
When depressive symptoms emerge during heavy substance use with no prior psychiatric history, the initial diagnosis is substance-induced depressive disorder, with reassessment after 2-4 weeks of abstinence.