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Question

Difficulty: MediumDepressive Disorders

A 36-year-old woman presents to the primary care clinic reporting a 5-week history of profound sadness, early morning awakening, decreased appetite, and difficulty concentrating at work. She states she has never felt this way before and denies any current suicidal ideation, hallucinations, or delusions. Her medical history is unremarkable, and she takes no medications. The physician determines she is experiencing a major depressive episode and considers initiating fluoxetine therapy. Which of the following is the most appropriate next step in the clinical care of this patient?

  1. Assess for a history of discrete periods characterized by abnormally elevated mood and impulsivityAnswer
  2. B
    Initiate fluoxetine monotherapy, as it remains the indicated treatment even if a past history of manic episodes is identified
  3. C
    Initiate fluoxetine with a strict plan to discontinue the medication immediately upon symptom remission to avoid long-term side effects
  4. D
    Initiate fluoxetine and concurrently prescribe a monoamine oxidase inhibitor to maximize the initial therapeutic response
  5. E
    Postpone pharmacotherapy until the mood symptoms have been continuously present for at least six months to rule out a primary psychotic disorder

Answer

Assess for a history of discrete periods characterized by abnormally elevated mood and impulsivity.
The most important next step in evaluating a patient presenting with a major depressive episode is to screen for a history of manic or hypomanic episodes. A patient with a history of mania who is currently depressed has bipolar I disorder, not major depressive disorder. Differentiating between unipolar and bipolar depression is critical because the treatment algorithms differ significantly. Initiating antidepressant monotherapy (such as fluoxetine) in a patient with bipolar disorder is contraindicated because it can precipitate a manic episode (manic switch) and increase mood instability. Therefore, assessing for periods of elevated mood, impulsivity, and decreased need for sleep must occur before writing the prescription.

Step-by-Step Solution

1
Diagnose the current episode
The patient meets criteria for a major depressive episode (at least 2 weeks of depressed mood/anhedonia plus associated symptoms like insomnia, weight loss, and poor concentration).
Establishing the current syndromal presentation is the first step in psychiatric evaluation.
2
Differentiate between unipolar and bipolar depression
The physician must actively screen for any past episodes of mania or hypomania.
A major depressive episode can occur in both Major Depressive Disorder (unipolar) and Bipolar Disorder. The treatments for these two conditions are fundamentally different.
3
Determine appropriate pharmacological safety
Initiating an SSRI (like fluoxetine) without ruling out bipolar disorder is unsafe.
Antidepressant monotherapy in a patient with undiagnosed bipolar disorder can precipitate a manic episode (manic switch) and lead to rapid cycling.

Key Concept

Prior to initiating antidepressant therapy for a depressive episode, patients must be screened for a history of mania or hypomania to avoid precipitating a manic episode.
Estimated Time:1m 15s
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Topics

Depressive Disorders

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