Psychiatrist.comPosttrauma Benzodiazepine Use and Subsequent PTSD: A Population-Wide Analysis Following Extreme Traumatic Exposure

ℹ️ Observational Association Only Evidence

Researchers analyzed 15,570 benzodiazepine-naïve adults exposed to a mass-trauma event and tracked PTSD diagnoses over 12 months. Early or delayed short-term benzodiazepine use was not associated with increased PTSD risk, while persistent use was associated with higher PTSD incidence.

Clinical Considerations

• PTSD incidence was 5.0% overall, with similar 12-month rates among nonpurchasers, early purchasers, and late purchasers.
• Early benzodiazepine use showed no increased PTSD risk after adjustment (HR 0.98, 95% CI 0.80–1.20).
• Persistent users demonstrated higher PTSD risk (HR 1.60 to 2.07), whereas discontinued users did not.
• Among highly trauma-exposed Gaza border residents, benzodiazepine purchasers had lower PTSD risk than nonpurchasers.

Practice Applications

• Interpret short-term posttrauma benzodiazepine use as not associated with increased PTSD risk in this cohort.
• Recognize that persistent benzodiazepine use may identify patients at elevated PTSD risk.
• Monitor ongoing benzodiazepine use patterns following traumatic exposure.
• Avoid inferring a protective effect because observational findings did not establish causality.