What is the typical duration of prophylactic anticonvulsants in severe TBI?

• A. 24 hours
• B. About 7 days (some protocols vary)
• C. 2 weeks
• D. 1 month

Answer: (B)

Prophylactic anticonvulsants after severe TBI are given to prevent seizures during the period of highest risk, which is the first week after injury. Targeting roughly seven days captures that window where early post-traumatic seizures are most likely. Extending beyond about a week hasn’t shown extra protection against later seizures and can add side effects and drug interactions, so a typical duration is about seven days. Some protocols vary slightly (for example, 5–7 days or up to 7–10 days) depending on local guidelines and individual risk factors, but 7 days is the standard target. Short courses like 24 hours are generally too brief to be effective, while longer courses are not routinely recommended unless specific circumstances call for them.