What is the role and timing of tranexamic acid in trauma care?

• A. Antifibrinolytic that reduces bleeding; most effective when given within 3 hours of injury; reduces transfusion requirements.
• B. A pain medication used during resuscitation.
• C. An antibiotic prophylactic given at wound closure.
• D. A topical hemostatic agent applied to wounds.

Answer: (A)

Tranexamic acid is an antifibrinolytic that helps stabilize clots by blocking the breakdown of fibrin, thereby reducing ongoing bleeding in trauma. In trauma care, the timing is crucial: giving it early, ideally within three hours of injury, has been shown to reduce mortality from bleeding and lower the need for transfusions. The benefit diminishes as the delay lengthens, and after about three hours the advantage is much smaller and may not be beneficial. It’s not a pain medication used during resuscitation, not an antibiotic prophylactic, and not a topical hemostatic agent applied to wounds.