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Question

Difficulty: MediumDepressive Disorders

A 29-year-old woman presents to the primary care clinic reporting a 6-week history of depressed mood, profound fatigue, and an inability to concentrate at work. She notes that her appetite has significantly increased, leading to a 4-kg (8.8-lb) weight gain. She often sleeps for 12 hours a night but still wakes up feeling unrefreshed, and states that her arms and legs frequently feel "like lead." Her medical history is unremarkable, and she takes no medications. Her vital signs are within normal limits. She recalls experiencing a similar episode of depression during her first year of college, which eventually resolved without treatment. The physician is considering initiating pharmacotherapy for her symptoms. Which of the following is the most appropriate next step in management?

  1. A
    Prescribe sertraline monotherapy to target the depressive symptoms
  2. B
    Prescribe a combination of paroxetine and phenelzine to address the atypical features
  3. Elicit a detailed history regarding periods of impulsivity, grandiosity, and decreased need for sleepAnswer
  4. D
    Diagnose schizophreniform disorder based on the 6-week symptom duration
  5. E
    Order an isolated free thyroxine (T4) level to rule out secondary hypothyroidism

Answer

Elicit a detailed history regarding periods of impulsivity, grandiosity, and decreased need for sleep
This patient presents with a major depressive episode characterized by atypical features (leaden paralysis, hypersomnia, weight gain, and profound fatigue). Before prescribing any antidepressant therapy, it is a critical requirement to screen every patient for a lifetime history of manic or hypomanic episodes. Bipolar disorder frequently begins with depressive episodes, and atypical features are particularly common in bipolar depression. If an antidepressant is given as monotherapy to a patient with unrecognized bipolar disorder, it can precipitate a manic or hypomanic episode (antidepressant-induced manic switch). Therefore, eliciting a history of impulsivity, grandiosity, and a decreased need for sleep is the most appropriate and necessary next step.

Step-by-Step Solution

1
Identify the primary clinical syndrome
The patient is experiencing a major depressive episode with atypical features, indicated by mood reactivity, hypersomnia, hyperphagia, and leaden paralysis.
Recognizing the current episode characteristics is necessary to determine the appropriate diagnostic and management pathways.
2
Evaluate the risk of bipolar disorder
The patient has a history of a prior depressive episode at a young age and current atypical features, both of which are commonly associated with bipolar depression.
Bipolar disorder often presents initially with depressive episodes, and recognizing this underlying vulnerability alters treatment significantly.
3
Determine the necessary prerequisite before initiating pharmacotherapy
The physician must screen for a lifetime history of mania or hypomania.
Starting an antidepressant (such as an SSRI) without a mood stabilizer in a patient with bipolar disorder can precipitate a dangerous manic switch.

Key Concept

All patients presenting with a major depressive episode must be screened for a history of manic or hypomanic episodes before initiating antidepressant monotherapy to avoid precipitating a manic switch.
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Topics

Depressive Disorders

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