Which drug class is commonly used as a second-line antiseizure medication after benzodiazepines in status epilepticus?

Study for the Medical FIDSAP v2 Test. Sharpen your skills with flashcards and multiple-choice questions, complete with hints and explanations. Prepare effectively for your upcoming test!

When seizures continue after benzodiazepines in status epilepticus, you need a second-line antiseizure medication that can be given intravenously and rapidly reduces neuronal excitability. Phenytoin (or its prodrug fosphenytoin) and valproate are classic choices because they help terminate ongoing seizure activity. Phenytoin mainly blocks voltage-gated sodium channels, stabilizing neuronal membranes and preventing repetitive firing. Valproate has a broader effect: it increases GABAergic inhibition and also blocks sodium channels, providing effective seizure control through multiple mechanisms. These properties make them well-suited for acute management after benzodiazepines. The other options listed are not used to acutely stop seizures in this setting—dexamethasone is a corticosteroid, penicillin is an antibiotic, and lidocaine is an antiarrhythmic/local anesthetic. This is why phenytoin or valproate is the best answer.