PTSD: Understanding It and the Treatments With the Strongest Evidence

The Neurobiology of Trauma

PTSD produces characteristic neurobiological changes: enlarged amygdala reactivity (heightened threat detection), reduced hippocampal volume (impaired contextual memory that would allow trauma memories to be placed "in the past"), and reduced medial prefrontal cortex activity (impaired "top-down" regulation of the amygdala). This explains the core symptom cluster: hypervigilance (overactive threat detection), intrusive memories (impaired contextualisation), and emotional dysregulation (insufficient frontal inhibition).

The Treatments With the Best Evidence

NICE (UK), the APA, and the VA/DoD clinical practice guidelines agree on the first-line psychological treatments for PTSD:

• Trauma-focused CBT (TF-CBT): Including prolonged exposure (PE) and cognitive processing therapy (CPT). The largest evidence base. Involves systematic, controlled re-engagement with trauma memories to enable extinction learning.
• EMDR (Eye Movement Desensitisation and Reprocessing): Trauma processing while tracking bilateral stimulation (eye movements, taps). Mechanistically different from CBT but produces comparable outcomes in head-to-head RCTs.

"Prolonged exposure is one of the most effective psychological treatments we have for any condition. 60-80% of patients show clinically significant improvement. The problem is access, not efficacy." - Edna Foa, University of Pennsylvania

What Does Not Have Strong Evidence

• Non-trauma-focused supportive therapy - less effective than trauma-focused approaches
• Debriefing immediately after trauma (Critical Incident Stress Debriefing) - evidence suggests it may increase PTSD risk in some cases
• Many alternative therapies marketed to trauma survivors - insufficient RCT evidence

Medication for PTSD

SSRIs (sertraline, paroxetine) are FDA-approved for PTSD and have moderate efficacy. They are most useful as adjuncts to psychotherapy, not replacements. Prazosin has evidence for PTSD nightmares specifically.

PTSD Treatment in Practice

If you or someone you know has PTSD, specifically request trauma-focused therapy - not general counselling or supportive therapy. The distinction matters enormously for outcomes. In the UK, NHS IAPT provides EMDR and TF-CBT. Internationally, the ISTSS website lists trained trauma therapists by location.