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Question

Difficulty: MediumDepressive Disorders

A 42-year-old man is evaluated in the psychiatric clinic for a six-week history of pervasive sadness, insomnia, low energy, and feelings of worthlessness. He frequently thinks about death but has no active suicidal plan. Vital signs and physical examination are unremarkable. Routine laboratory studies, including thyroid function tests, are within normal limits. During the interview, the patient mentions that in his late twenties, he had a one-week period where he slept only two hours a night, felt extremely energetic, and took out multiple unapproved bank loans for a 'revolutionary' business idea. He was hospitalized during that episode. He is currently taking no medications. What is the most appropriate next step in pharmacological management for this patient?

  1. QuetiapineAnswer
  2. B
    Escitalopram
  3. C
    Valproic acid
  4. D
    Lithium and venlafaxine
  5. E
    Lamotrigine

Answer

Quetiapine
The patient's current presentation of severe depression, combined with a history of a manic episode requiring hospitalization (decreased need for sleep, grandiosity, impulsivity), solidifies the diagnosis of bipolar I disorder, currently in a depressed episode. The treatment of bipolar depression differs significantly from unipolar depression. First-line pharmacological options for acute bipolar depression include second-generation antipsychotics such as quetiapine, lurasidone, and cariprazine, as well as the olanzapine-fluoxetine combination. Quetiapine has proven efficacy in rapidly alleviating depressive symptoms in bipolar disorder without carrying a high risk of inducing mania.

Step-by-Step Solution

1
Identify the patient's current clinical syndrome.
Major depressive episode.
The patient presents with a six-week history of depressed mood, insomnia, anergia, and passive suicidal ideation.
2
Evaluate the past psychiatric history for prior mood episodes.
History of a severe manic episode requiring hospitalization.
The patient experienced a one-week period of decreased need for sleep, grandiosity, and impulsive behavior leading to hospitalization, which definitively meets criteria for a manic episode.
3
Select the most appropriate pharmacological treatment based on the combined history.
Quetiapine is selected.
The diagnosis is bipolar I disorder, current episode depressed. Quetiapine is a first-line monotherapy for acute bipolar depression that avoids the risk of inducing a manic switch.

Key Concept

Pharmacological management of acute bipolar depression
Estimated Time:1m 15s
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Topics

Depressive Disorders

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