Which drug is given to a patient to prevent seizure activity that occurs with some types of specific brain injuries?

Which drug is given to a patient to prevent seizure activity that occurs with some types of specific brain injuries?

• A. Levetiracetam
• B. Phenytoin
• C. Phenobarbital
• D. Diazepam

Answer: (B)

Preventing seizures after brain injury relies on using an anticonvulsant that reduces sustained neuronal firing in the acute period when the brain is most irritable. Phenytoin has long been used for this purpose after traumatic brain injury because it lowers the risk of early post-injury seizures, typically within the first week. It achieves this by blocking voltage-gated sodium channels, which stabilizes neuronal membranes and prevents the rapid, repetitive firing that can lead to seizure activity. While newer drugs like levetiracetam are also options and may have favorable side-effect profiles, phenytoin remains a classic and well-established choice for this prophylaxis. Diazepam and phenobarbital serve more as acute seizure control or treatment for other conditions rather than routine preventive therapy after brain injury, which is why they are not the best fit in this context.

Preventing seizures after brain injury relies on using an anticonvulsant that reduces sustained neuronal firing in the acute period when the brain is most irritable. Phenytoin has long been used for this purpose after traumatic brain injury because it lowers the risk of early post-injury seizures, typically within the first week. It achieves this by blocking voltage-gated sodium channels, which stabilizes neuronal membranes and prevents the rapid, repetitive firing that can lead to seizure activity. While newer drugs like levetiracetam are also options and may have favorable side-effect profiles, phenytoin remains a classic and well-established choice for this prophylaxis. Diazepam and phenobarbital serve more as acute seizure control or treatment for other conditions rather than routine preventive therapy after brain injury, which is why they are not the best fit in this context.