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Difficulty: EasyBipolar and Related Disorders

A 32-year-old architect is evaluated in the clinic for worsening sadness and inability to concentrate at work over the past month. He reports sleeping up to 14 hours a day and feeling completely drained of energy. He has a history of an emergency department visit 4 years ago when he was brought in by his family for not sleeping for 6 days, talking rapidly, and spending a large portion of his savings on impulsive online purchases while claiming he had a foolproof plan to become a billionaire. He was hospitalized and stabilized at that time but stopped all medications 2 years ago. His vital signs are within normal limits. Physical examination shows no focal neurologic deficits and normal thyroid gland palpation. Mental status examination reveals a man with slumped posture, psychomotor retardation, and a depressed, congruent affect. He denies active suicidal ideation or auditory hallucinations. Which of the following is the most appropriate next step in management?

  1. A
    Initiate bupropion
  2. B
    Initiate escitalopram
  3. C
    Initiate fluoxetine and tranylcypromine
  4. Initiate quetiapineAnswer
  5. E
    Initiate risperidone for schizophreniform disorder

Answer

Initiate quetiapine
The correct answer is to initiate quetiapine. This patient's current presentation of depressed mood, hypersomnia, anhedonia, and psychomotor retardation for one month easily meets the criteria for a major depressive episode. However, his past history of an elevated mood, decreased need for sleep, rapid speech, impulsive spending, and grandiose delusions lasting 6 days clearly meets the criteria for a manic episode. Therefore, his overarching diagnosis is bipolar I disorder, currently presenting in a depressive episode. First-line pharmacological treatment for acute bipolar depression includes certain second-generation antipsychotics (such as quetiapine or lurasidone) and mood stabilizers (such as lithium or lamotrigine). These agents effectively treat the depressive symptoms without carrying a significant risk of precipitating a manic switch.

Step-by-Step Solution

1
Identify the patient's current clinical state.
The patient presents with severe sadness, hypersomnia, and poor concentration lasting one month, indicating a major depressive episode.
Establishing the current mood state is the first step in psychiatric evaluation.
2
Evaluate the past psychiatric history for prior affective episodes.
The history of a 6-day episode of decreased need for sleep, rapid speech, grandiosity, and impulsive spending indicates a past manic episode, establishing the diagnosis of bipolar I disorder.
Differentiating major depressive disorder from bipolar disorder is critical to avoid incorrect pharmacological treatment.
3
Determine the appropriate pharmacotherapy for acute bipolar depression.
Monotherapy with specific second-generation antipsychotics (e.g., quetiapine, lurasidone) or mood stabilizers is the standard of care.
These agents effectively treat the depression without inducing a manic switch.

Key Concept

Patients with bipolar I disorder presenting with a major depressive episode should be treated with specific mood stabilizers or second-generation antipsychotics (e.g., quetiapine, lurasidone). Antidepressant monotherapy is strictly contraindicated due to the high risk of precipitating a manic switch.
Estimated Time:1m 0s
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Topics

Bipolar and Related Disorders

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