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Difficulty: Very hardAnxiety, OCD, and Trauma-Related Disorders

A 22-year-old man presents to the psychiatry clinic complaining of profound fatigue, poor concentration, and severe sleep disturbances. Five weeks ago, he was held at gunpoint during a convenience store robbery. Since the incident, he has experienced recurrent nightmares about the event, actively avoids the neighborhood where the store is located, and feels constantly "on edge." He also describes distressing periods where he feels as though he is floating outside of his own body. His past medical history is significant for a major depressive episode at age 19. At that time, he was prescribed fluoxetine; however, within two weeks of starting the medication, he developed a severe episode of elated mood, pressured speech, and a decreased need for sleep that lasted for eight days. The fluoxetine was discontinued, and he subsequently stabilized. He also reports a separate episode two years ago during which he heard voices telling him he was special; this lasted for three weeks and resolved entirely without treatment. The patient admits that due to his recent severe distress, he restarted taking leftover fluoxetine from his old prescription three days ago. He is requesting additional medication to help him cope. Which of the following is the most appropriate next step in the management of this patient's current condition?

  1. Discontinue fluoxetine and initiate trauma-focused cognitive behavioral therapyAnswer
  2. B
    Increase the dosage of fluoxetine to appropriately target post-traumatic symptoms
  3. C
    Discontinue fluoxetine and immediately initiate phenelzine therapy
  4. D
    Diagnose schizophreniform disorder and initiate a second-generation antipsychotic
  5. E
    Contact local law enforcement to report his psychiatric decompensation

Answer

The most appropriate next step is to discontinue the fluoxetine and initiate trauma-focused cognitive behavioral therapy.
The correct answer involves stopping the offending medication and utilizing a safe, non-pharmacologic first-line treatment. This patient meets the diagnostic criteria for Post-Traumatic Stress Disorder (PTSD) with dissociative features, given his exposure to a life-threatening event, intrusive nightmares, avoidance behaviors, hyperarousal, and depersonalization lasting for more than one month (5 weeks). While selective serotonin reuptake inhibitors (SSRIs) like fluoxetine are typically first-line pharmacotherapy for PTSD, this patient has a history of an SSRI-induced manic episode lasting 8 days, which suggests an underlying Bipolar I Disorder diathesis. In patients with bipolar disorder, SSRI monotherapy is contraindicated due to the high risk of precipitating acute mania. Therefore, the recently restarted fluoxetine must be discontinued. Trauma-focused cognitive behavioral therapy (TF-CBT) is an equally effective, first-line non-pharmacologic treatment for PTSD that carries no risk of mood destabilization, making it the most appropriate next step.

Step-by-Step Solution

1
Diagnose the current acute presentation based on symptom duration and characteristics.
The patient has Post-Traumatic Stress Disorder (PTSD) with dissociative features, as his intrusion, avoidance, hyperarousal, and depersonalization symptoms have lasted for greater than 1 month (5 weeks) following a life-threatening trauma.
Accurate diagnosis of the trauma-related disorder is required to establish the baseline indication for treatment.
2
Analyze the patient's past psychiatric history for treatment contraindications.
The patient developed an 8-day manic episode directly following fluoxetine initiation at age 19. This establishes an underlying Bipolar I diathesis.
A history of antidepressant-induced mania fundamentally alters the algorithm for pharmacological management of depression or anxiety disorders.
3
Evaluate the safety of the patient's current self-medication.
The patient recently restarted fluoxetine, which places him at imminent risk of a recurrent manic episode.
SSRI monotherapy is contraindicated in patients with bipolar disorder.
4
Select the safest, evidence-based first-line treatment for the current diagnosis.
Discontinue the contraindicated fluoxetine. Initiate trauma-focused cognitive behavioral therapy (TF-CBT), which is a first-line treatment for PTSD that carries no risk of mood destabilization.
First-line treatments for PTSD include SSRIs/SNRIs or TF-CBT; given the pharmacological contraindication, psychotherapy is the definitive choice.

Key Concept

Management of Post-Traumatic Stress Disorder in patients with comorbid bipolar disorder requires avoiding SSRI monotherapy and prioritizing non-pharmacologic first-line therapies like trauma-focused CBT.

Alternative Method

If pharmacotherapy is absolutely necessary and non-pharmacologic therapies fail, treating this patient would first require establishing a mood-stabilizing foundation (e.g., a second-generation antipsychotic like quetiapine, or valproate/lithium) before considering cautious reintroduction of trauma-targeted agents, though evidence for specific PTSD pharmacotherapy in bipolar patients remains complex.
Estimated Time:1m 30s
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Topics

Anxiety, OCD, and Trauma-Related Disorders

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