TXA has contraindications including timing after injury. Which statement is accurate?

TXA has contraindications including timing after injury. Which statement is accurate?

• A. Within 1 hour of injury
• B. Within 3 hours of injury
• C. Greater than 3 hours from traumatic injury
• D. There is no time restriction

Answer: (C)

TXA works by blocking fibrinolysis, helping to stabilize clots and reduce bleeding in trauma. Its benefit is strongly time-dependent: the evidence supports giving TXA within three hours of injury, with the strongest effect in the first hour. Beyond three hours, the advantage fades and the treatment is not recommended because there is little evidence of benefit and potential risk. So, administration more than three hours after injury is not advised, which makes that statement accurate. Statements implying administration within one or three hours reflect the accepted window, not contraindications, and claiming no time restriction contradicts the evidence.

TXA works by blocking fibrinolysis, helping to stabilize clots and reduce bleeding in trauma. Its benefit is strongly time-dependent: the evidence supports giving TXA within three hours of injury, with the strongest effect in the first hour. Beyond three hours, the advantage fades and the treatment is not recommended because there is little evidence of benefit and potential risk.

So, administration more than three hours after injury is not advised, which makes that statement accurate. Statements implying administration within one or three hours reflect the accepted window, not contraindications, and claiming no time restriction contradicts the evidence.