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Difficulty: HardAnxiety, OCD, and Trauma-Related Disorders

An outpatient psychiatric consultation is requested for a 42-year-old female patient experiencing debilitating, multi-domain worry. Over the last 7 months, she has been unable to control her persistent apprehension regarding her career stability, household finances, and the well-being of her children. These pervasive concerns are accompanied by chronic cervical muscle tension, poor concentration, and prominent fatigue. She denies any prior manic or hypomanic episodes.

Four weeks ago, the patient began taking phenelzine for refractory atypical depression. While her mood has significantly brightened, her anxiety symptoms have remained unchanged. At age 20, she experienced a discrete 14-day period characterized by intense auditory hallucinations and paranoid delusions, which resolved entirely without long-term sequelae.

Midway through the consultation, the clinic's front desk forwards a phone call from the patient's supervisor. The supervisor wishes to verify that the patient is receiving medical care so that her paid leave can be formally approved. The patient has not completed any release of information forms.

Recent laboratory investigations reveal:
Thyroid-stimulating hormone (TSH): 2.4 µU/mL (normal: 0.5-5.0 µU/mL)
Free thyroxine (T4): 0.5 ng/dL (normal: 0.9-1.7 ng/dL)

Which of the following is the most appropriate action in the management of this patient?

  1. Recommend structured psychotherapy aimed at cognitive restructuringAnswer
  2. B
    Prescribe a selective serotonin reuptake inhibitor for her anxiety
  3. C
    Begin thyroid hormone replacement for primary hypothyroidism
  4. D
    Start maintenance antipsychotic pharmacotherapy for schizophrenia
  5. E
    Confirm the patient's clinic attendance with the supervisor over the phone

Answer

Recommend structured psychotherapy aimed at cognitive restructuring
The correct answer recommends structured psychotherapy aimed at cognitive restructuring (Cognitive-Behavioral Therapy, CBT). This patient meets the DSM-5 criteria for Generalized Anxiety Disorder (GAD), characterized by excessive worry across multiple domains for at least 6 months, accompanied by somatic symptoms such as muscle tension and fatigue. Both CBT and selective serotonin reuptake inhibitors (SSRIs) are first-line treatments for GAD. However, this patient was recently started on phenelzine, a monoamine oxidase inhibitor (MAOI). The concomitant use of an MAOI and a serotonergic agent (like an SSRI) is absolutely contraindicated due to the high risk of precipitating potentially fatal serotonin syndrome. Therefore, initiating a non-pharmacologic first-line therapy like CBT is the safest and most appropriate next step.

Step-by-Step Solution

1
Analyze the patient's primary psychiatric symptoms.
The patient presents with 7 months of excessive, multi-domain worry, fatigue, and muscle tension.
These symptoms fulfill the DSM-5 diagnostic criteria for Generalized Anxiety Disorder (GAD).
2
Identify contraindications in the current medication regimen.
The patient is taking phenelzine, a monoamine oxidase inhibitor (MAOI).
MAOIs can cause life-threatening serotonin syndrome if combined with serotonergic medications like SSRIs or SNRIs, ruling out first-line pharmacotherapy for GAD.
3
Evaluate laboratory results to rule out medical mimics.
TSH is normal and Free T4 is low.
This pattern indicates central (secondary) hypothyroidism, not primary hypothyroidism (which presents with elevated TSH). Additionally, hypothyroidism causes fatigue rather than the excessive worry typical of GAD.
4
Determine the safest and most effective management step while maintaining ethical boundaries.
Recommend structured psychotherapy (CBT).
CBT is a first-line treatment for GAD, avoids the fatal risk of serotonin syndrome, and properly addresses her primary complaint without violating patient confidentiality.

Key Concept

First-line management of Generalized Anxiety Disorder (GAD) involves CBT or SSRI/SNRIs; however, CBT is the safest and most appropriate choice when pharmacotherapy is absolutely contraindicated (e.g., concurrent MAOI use).
Estimated Time:1m 30s
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Topics

Anxiety, OCD, and Trauma-Related Disorders

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