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Difficulty: EasyDepressive Disorders

A 22-year-old college student presents to the university outpatient clinic reporting a 5-week history of feeling profoundly sad, crying frequently, and lacking the motivation to attend her classes. She reports sleeping up to 12 hours a day and eating significantly more than usual, resulting in a 4 kg (8.8 lb) weight gain. She has no significant past medical history, and her vital signs are within normal limits. Laboratory tests, including a complete blood count and thyroid-stimulating hormone (TSH) level, are normal. She currently takes no medications or illicit substances. The physician suspects a major depressive episode and plans to prescribe fluoxetine. Which of the following is the most appropriate next step in the clinical evaluation and management of this patient?

  1. Inquire about any past periods of persistently elevated mood, grandiosity, and decreased need for sleepAnswer
  2. B
    Prescribe fluoxetine monotherapy immediately and schedule a routine follow-up appointment in 4 weeks
  3. C
    Prescribe fluoxetine and instruct the patient to discontinue the medication immediately once her depressive symptoms resolve
  4. D
    Assess the patient for a history of disorganized speech and negative symptoms lasting for at least 6 months
  5. E
    Re-order the thyroid function tests to ensure the initial normal TSH results were not misread

Answer

Inquire about any past periods of persistently elevated mood, grandiosity, and decreased need for sleep
The correct next step is to screen for a history of manic or hypomanic episodes. This patient presents with a major depressive episode characterized by atypical features (hypersomnia, weight gain). Before initiating antidepressant monotherapy (e.g., fluoxetine), it is absolutely critical to rule out a history of bipolar disorder. Prescribing an antidepressant to a patient with unrecognized bipolar disorder can precipitate a manic or hypomanic episode (manic switch). Therefore, specifically asking about periods of persistently elevated mood, impulsivity, and decreased need for sleep is mandatory.

Step-by-Step Solution

1
Identify the patient's primary syndrome
The patient meets criteria for a major depressive episode with atypical features (hypersomnia, hyperphagia, leaden paralysis or weight gain).
Establishing the current episode is necessary before determining the treatment plan.
2
Evaluate the planned pharmacological intervention
The physician plans to prescribe an SSRI (fluoxetine).
Antidepressant monotherapy is the standard treatment for unipolar major depressive disorder.
3
Determine the critical prerequisite before initiating an antidepressant
A lifetime history of mania or hypomania must be ruled out.
If the patient has an undiagnosed history of mania or hypomania (Bipolar I or II disorder), SSRI monotherapy can precipitate a manic switch or rapid cycling. Therefore, screening for these symptoms is the most appropriate next step.

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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