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Question

Difficulty: MediumDepressive Disorders

A 37-year-old man comes to the psychiatrist complaining of feeling "completely empty" for the past 2 months. He reports that he has lost interest in his architectural work, which he usually loves, and struggles to get out of bed before noon. His appetite has decreased, leading to an 8-lb (3.6-kg) weight loss. He expresses intense guilt over a minor calculation mistake he made on a project a year ago. A review of his past medical records reveals an emergency department visit 3 years ago for acute agitation. During that visit, he was speaking so quickly he was difficult to understand, claimed he had discovered the secret to limitless energy, and had not slept in 5 days. He was stabilized on a medication that he subsequently stopped taking because he felt it blunted his creativity. His vital signs and physical examination today are unremarkable. Which of the following is the most appropriate next step in the pharmacologic management of this patient's current symptoms?

  1. A
    Sertraline therapy
  2. B
    Haloperidol therapy
  3. Lurasidone therapyAnswer
  4. D
    Venlafaxine therapy
  5. E
    Fluoxetine and phenelzine combination therapy

Answer

Lurasidone therapy
The correct answer is lurasidone therapy. This patient is currently experiencing a major depressive episode, but his history of a distinct period of severe agitation, pressured speech, grandiosity, and decreased need for sleep lasting 5 days (which required emergency stabilization) meets the criteria for a past manic episode. Therefore, his correct diagnosis is bipolar I disorder, currently in a depressed phase (bipolar depression). The first-line pharmacological treatments for bipolar depression include lurasidone, quetiapine, and the olanzapine-fluoxetine combination. Lurasidone is a second-generation (atypical) antipsychotic that effectively treats bipolar depression without the risk of inducing a manic switch.

Step-by-Step Solution

1
Analyze the current clinical presentation.
The patient has a 2-month history of depressed mood, anhedonia, neurovegetative symptoms (weight loss, hypersomnia), and excessive guilt, indicating a major depressive episode.
Identifying the current affective state is the first step in establishing the phase of illness.
2
Evaluate the past psychiatric history.
The history of a distinct period of rapid speech, grandiosity, and decreased need for sleep lasting 5 days (requiring emergency intervention) indicates a past manic episode.
A history of mania changes the primary diagnosis from major depressive disorder (unipolar) to bipolar I disorder.
3
Determine the most appropriate treatment for bipolar depression.
Lurasidone is selected as it is an FDA-approved, first-line atypical antipsychotic for acute bipolar depression.
Antidepressant monotherapy must be avoided in bipolar I disorder due to the severe risk of precipitating a manic switch.

Key Concept

Management of Bipolar Depression
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Topics

Depressive Disorders

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