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Difficulty: HardDepressive Disorders

A 61-year-old man, currently in remission from colon cancer, is evaluated in the oncology survivorship clinic for a 2-month history of pervasive low mood, anhedonia, severe fatigue, and feelings of worthlessness. He is not currently taking any psychiatric medications and has no prior psychiatric history. Based on standard psychiatric guidelines for the stepped-care management of Major Depressive Disorder (MDD), arrange the following clinical steps in the most appropriate chronological sequence, assuming the patient exhibits inadequate responses to initial treatments and eventually develops life-threatening clinical features.

  1. 1Evaluate thyroid function and screen for past periods of persistent elevated mood and decreased need for sleep.
  2. 2Prescribe sertraline monotherapy and schedule a follow-up assessment in 4 to 6 weeks.
  3. 3Increase the dosage of sertraline to the maximum tolerated level due to a partial clinical response.
  4. 4Add adjunctive aripiprazole after the patient fails to achieve remission on a maximized dose of sertraline.
  5. 5Refer for urgent inpatient electroconvulsive therapy (ECT) after the patient develops severe inanition and mutism.

Answer

The correct sequence begins with screening for medical causes and bipolar disorder, followed by initiating an SSRI, titrating the dose for a partial response, augmenting the regimen for non-response, and ultimately referring for ECT if life-threatening inanition develops.
The standard stepped-care algorithm for Major Depressive Disorder begins with ruling out medical mimics (e.g., hypothyroidism) and screening for bipolar disorder. Once unipolar MDD is confirmed, first-line treatment is typically an SSRI with a 4-to-6-week follow-up. If a partial response occurs, dose optimization is the appropriate next step before abandoning the drug. If treatment resistance persists after a maximized dose, augmentation with an agent like an atypical antipsychotic or bupropion is indicated. Finally, ECT is reserved for refractory cases or emergent, life-threatening complications such as inanition (food/fluid refusal), severe suicidality, or catatonia.

Step-by-Step Solution

1
Determine the necessary initial psychiatric and medical evaluation steps for a new onset depressive episode.
Identify the need to evaluate thyroid function and screen for bipolar disorder (prior hypomania/mania).
Medical mimics must be ruled out, and unrecognized bipolar disorder can be worsened by antidepressant monotherapy.
2
Select the appropriate initial pharmacotherapy for unipolar Major Depressive Disorder.
Identify the initiation of an SSRI (e.g., sertraline) and schedule follow-up in 4 to 6 weeks.
SSRIs are first-line treatments, and an adequate time frame is required to assess the initial clinical response.
3
Determine the next management step for a partial response to an initial antidepressant trial.
Identify dose titration to the maximum tolerated level.
Dose optimization is indicated before switching or augmenting when a patient shows partial improvement on a tolerated agent.
4
Select the appropriate intervention for treatment resistance following a maximized monotherapy trial.
Identify augmentation with an adjunctive agent, such as aripiprazole.
Augmentation is recommended when a patient fails to remit despite an optimized dose of first-line monotherapy.
5
Determine the definitive treatment for severe MDD complicated by life-threatening features.
Identify urgent electroconvulsive therapy (ECT).
ECT is the most rapid and effective intervention for severe depression complicated by inanition (food/fluid refusal) or catatonia.

Key Concept

Stepped-care management of Major Depressive Disorder (MDD)
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Topics

Depressive Disorders

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