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Difficulty: MediumBipolar and Related Disorders

A 27-year-old male civil engineer is brought to the psychiatric emergency service by his roommate. The patient has been isolating in his bedroom for the past month, sleeping over 14 hours a day, and neglecting his personal hygiene. During the interview, he exhibits profound psychomotor retardation and admits to active suicidal ideation with a plan to ingest household chemicals. His medical history is unremarkable. Upon review of his psychiatric history, his roommate reports that three years ago, the patient experienced a distinct three-week period during which he slept only two hours per night, spoke so rapidly he was nearly incomprehensible, and frantically wrote a 500-page manifesto believing he had independently solved major problems in quantum physics. The patient was hospitalized at that time but subsequently lost to follow-up. Vital signs and routine laboratory studies are within normal limits. Which of the following pharmacological interventions are appropriate for this patient's current presentation? (Select all that apply)

  1. Initiate quetiapine monotherapyAnswer
  2. Initiate lurasidone monotherapyAnswer
  3. C
    Initiate fluoxetine monotherapy
  4. D
    Initiate a combination of fluoxetine and tranylcypromine
  5. E
    Diagnose schizophreniform disorder and initiate paliperidone

Answer

The appropriate next steps are to initiate quetiapine monotherapy or initiate lurasidone monotherapy.
The patient's history of a distinct period of decreased sleep, pressured speech, and grandiose delusions lasting three weeks meets the criteria for a manic episode, firmly establishing the diagnosis of Bipolar I Disorder. He is currently experiencing a severe bipolar depressive episode with active suicidal ideation. The standard of care for acute bipolar depression includes monotherapy with specific second-generation antipsychotics that have proven efficacy for the depressive phase of bipolar disorder, such as quetiapine, lurasidone, cariprazine, or lumateperone. These agents treat the depression without the significant risk of inducing mania.

Step-by-Step Solution

1
Analyze the patient's current symptoms and past psychiatric history.
Current severe major depressive episode (hypersomnia, anhedonia, suicidal ideation). Past history of a distinct 3-week episode of decreased sleep, pressured speech, and grandiose delusions.
Establishing the correct longitudinal diagnosis is crucial before initiating psychiatric medications.
2
Determine the primary diagnosis.
The history of a manic episode establishes the diagnosis of Bipolar I Disorder. The current presentation is an acute bipolar depressive episode.
A single manic episode is sufficient to diagnose Bipolar I Disorder, which completely alters the treatment algorithm for subsequent depressive episodes.
3
Select appropriate pharmacological treatment for acute bipolar depression.
Quetiapine and lurasidone are identified as first-line FDA-approved monotherapies. Antidepressant monotherapy (fluoxetine) and dangerous combinations (fluoxetine + MAOI) are rejected.
Effective treatment for bipolar depression requires agents that lift mood without precipitating a manic switch. Certain second-generation antipsychotics possess these mood-stabilizing properties.

Key Concept

Diagnosis of Bipolar I Disorder based on a prior manic episode, and treatment of acute bipolar depression using approved second-generation antipsychotics while avoiding antidepressant monotherapy.
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Topics

Bipolar and Related Disorders

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