Educational resource only — this page helps students conceptualize diagnostic presentations and is not intended for clinical decision-making or self-diagnosis. Content may contain gaps or simplifications. Always verify against current clinical references and follow your institution’s protocols.
F43.10

Post-Traumatic Stress Disorder

PTSD
Diagnostic Category
Trauma- and Stressor-Related Disorders
Key Features
  • Post-Traumatic Stress Disorder
  • Core feature: Exposure to actual or threatened death, serious injury, or sexual violence, followed by characteristic symptoms across four clusters persisting for more than 1 month
  • Lifetime prevalence: approximately 6-7% in the general population, substantially higher in trauma-exposed populations (military, first responders, sexual assault survivors)
  • The diagnostic challenge with PTSD is not the classic presentation - that one is recognizable. It is the patients who present with depression, substance use, irritability, or somatic complaints and whose trauma history is never asked about.

Red Flags & Key Clinical Considerations

Undisclosed Trauma History

Many patients with PTSD never volunteer their trauma history. They present with depression, substance use, insomnia, or anger - the downstream consequences. The trauma stays hidden because no one asks, or because they don't label their experiences as trauma. Screen with behavioral questions: "Has anything happened to you that was frightening, dangerous, or that you felt you couldn't control?" rather than "Have you experienced trauma?"

Treatment-Resistant Depression

When depression fails to respond to multiple adequate antidepressant trials, consider whether the primary diagnosis is wrong. Depression secondary to undiagnosed PTSD will not respond to antidepressants alone because the driving condition - PTSD - requires trauma-focused treatment. Look for: nightmares, avoidance patterns, emotional numbing beyond typical anhedonia, hypervigilance.

Substance Use Mapping to Symptom Clusters

When a patient's substance use pattern maps to specific PTSD symptom clusters - alcohol for hyperarousal, cannabis for nightmares, stimulants for concentration and fatigue - the substance use may be self-medication for undiagnosed PTSD. Treating the substance use alone without addressing the underlying PTSD typically results in relapse.

Anger as the Presenting Problem

Explosive anger with a clear temporal onset tied to a traumatic event is a Cluster E PTSD symptom, not an independent anger management problem. This is especially common in male patients and military/first responder populations where emotional vulnerability is culturally suppressed. Ask about the timeline: when did the anger pattern start or escalate?

Premature Diagnosis in the Acute Window

PTSD cannot be diagnosed until symptoms persist for more than 1 month. Within the first month, diagnose acute stress disorder. Many acute trauma responses resolve naturally within 30 days. Premature PTSD diagnosis risks pathologizing normal recovery and may lead to unnecessary treatment escalation.

Related Medications

Medications commonly used in the treatment of post-traumatic stress disorder:

Practice With Related Cases

Practice identifying and managing post-traumatic stress disorder through these educational case studies:

References & Further Reading

This educational summary synthesizes information from standard clinical references for learning purposes. It is not a substitute for primary sources. Always verify against current clinical guidelines before applying any content in practice.

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