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Difficulty: MediumBipolar and Related Disorders

A 41-year-old chef is brought to the outpatient clinic by his business partner due to a severe decline in functioning over the past six weeks. The patient describes a pervasive feeling of emptiness, increased appetite, and sleeping up to 12 hours daily. He also reports occasionally hearing a voice telling him he is a 'complete failure.' He has stopped going to the restaurant and avoids social contact. The business partner notes that four years ago, the patient had a distinctly different episode lasting three weeks during which he slept only three hours a night, talked incessantly, and maxed out multiple credit cards to launch an ill-advised catering business. The patient takes no medications and has no other medical conditions. Vital signs and physical examination are unremarkable. Which of the following is the most appropriate next step in management?

  1. Initiate quetiapineAnswer
  2. B
    Initiate escitalopram
  3. C
    Initiate fluoxetine and phenelzine
  4. D
    Diagnose schizophreniform disorder and initiate haloperidol
  5. E
    Initiate venlafaxine

Answer

The most appropriate next step in management is to initiate quetiapine.
This patient's current presentation of severe depressed mood, hypersomnia, hyperphagia, and mood-congruent auditory hallucinations lasting six weeks constitutes a major depressive episode with psychotic features. Crucially, his history reveals a distinct 3-week period of decreased sleep, pressured speech, and impulsive spending, which fulfills the criteria for a past manic episode. The presence of at least one manic episode in a patient's lifetime establishes the diagnosis of Bipolar I disorder. The most appropriate pharmacological treatment for acute bipolar depression includes select second-generation antipsychotics (such as quetiapine, lurasidone, or cariprazine) or a combination of olanzapine and fluoxetine. Quetiapine is highly effective as monotherapy for bipolar depression and will additionally target the patient's psychotic symptoms.

Step-by-Step Solution

1
Analyze the current clinical presentation to determine the mood state.
The 6-week history of severe low mood, hyperphagia, hypersomnia, and mood-congruent auditory hallucinations meets criteria for a Major Depressive Episode with psychotic features.
Identifying the current phase of illness is the first step in psychiatric diagnosis and management.
2
Review the psychiatric history for evidence of previous mood episodes.
The patient experienced a 3-week episode four years ago involving decreased need for sleep, pressured speech, and impulsivity, which meets the criteria for a Manic Episode.
A history of mania completely alters the diagnosis from unipolar depression to a bipolar spectrum disorder.
3
Synthesize the findings to establish the definitive diagnosis.
The combination of a past manic episode and a current major depressive episode confirms a diagnosis of Bipolar I disorder, current episode depressed.
Accurate diagnosis is crucial because treatments for unipolar depression can worsen bipolar disorder.
4
Select the most appropriate pharmacotherapy based on the diagnosis.
Quetiapine is selected as it is a first-line monotherapy for acute bipolar depression and effectively treats psychotic features.
Antidepressant monotherapy is contraindicated in bipolar disorder, making second-generation antipsychotics or specific mood stabilizers the preferred approach.

Key Concept

Patients presenting with a major depressive episode must be carefully screened for a history of mania, as the diagnosis of Bipolar I disorder fundamentally changes management. First-line treatment for acute bipolar depression includes second-generation antipsychotics like quetiapine or lurasidone, whereas antidepressant monotherapy is contraindicated.
Estimated Time:1m 30s
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Bipolar and Related Disorders

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