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Difficulty: MediumAnxiety, OCD, and Trauma-Related Disorders

A primary care physician evaluates a 29-year-old female patient complaining of unrelenting anxiety regarding her job security, personal finances, and general health that has persisted for the past 9 months. She describes experiencing frequent muscle tension, daytime fatigue, and poor concentration. During the psychiatric history, she mentions that 4 years ago she had a distinct 14-day period where she "felt invincible," required only 90 minutes of sleep per night, and maxed out her credit cards on impulsive purchases. She states her mood is currently euthymic. Her past medical history is notable for a methicillin-resistant Staphylococcus aureus (MRSA) skin infection, for which she was prescribed linezolid 3 days ago. Which of the following are appropriate considerations regarding this patient's diagnosis and management? (Select exactly 2 options)

  1. Engagement in cognitive-behavioral therapy as a primary intervention for the anxiety symptomsAnswer
  2. Avoidance of all serotonergic medications during the current antibiotic regimenAnswer
  3. C
    Initiation of sertraline monotherapy immediately following the completion of the antibiotic course
  4. D
    Prescription of daily paroxetine starting today to provide immediate relief for the chronic worry
  5. E
    Classification of the historical 14-day behavioral change as schizophreniform disorder based on symptom duration

Answer

The correct management considerations are engagement in cognitive-behavioral therapy (CBT) and the strict avoidance of serotonergic medications during her linezolid therapy.
This patient presents with symptoms of Generalized Anxiety Disorder (GAD) in the context of a history of Bipolar I Disorder (evidenced by the prior manic episode) and current linezolid therapy. Cognitive-behavioral therapy (CBT) is an evidence-based, first-line treatment for GAD that avoids the risk of inducing a manic switch. Furthermore, linezolid is a weak, reversible monoamine oxidase inhibitor (MAOI). Co-administering any serotonergic medication (like an SSRI or SNRI) with linezolid is strictly contraindicated due to the high risk of precipitating life-threatening serotonin syndrome.

Step-by-Step Solution

1
Analyze the current psychiatric presentation.
The patient has 9 months of excessive worry, muscle tension, fatigue, and poor concentration, meeting DSM-5 criteria for Generalized Anxiety Disorder (GAD).
To establish the primary target for current intervention.
2
Evaluate the historical psychiatric episode.
The 14-day period of decreased need for sleep, grandiosity, and impulsive behavior indicates a past manic episode, establishing a background diagnosis of Bipolar I Disorder.
To identify contraindications for pharmacotherapy, such as the risk of antidepressant-induced mania.
3
Assess the current medication regimen for interactions.
The patient is taking linezolid, an antibiotic that also possesses reversible monoamine oxidase inhibitor (MAOI) properties.
To prevent potentially fatal drug-drug interactions when considering anxiolytic medications.
4
Determine the optimal management strategy.
CBT is a safe, effective first-line treatment for GAD. Serotonergic agents must be avoided currently (due to linezolid) and in the future as monotherapy (due to Bipolar I).
To treat the patient safely based on her complex pharmacological and psychiatric presentation.

Key Concept

Management of Anxiety Disorders in the context of Bipolar I Disorder and MAOI (linezolid) therapy
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Topics

Anxiety, OCD, and Trauma-Related Disorders

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