What is a common initial drug given for acute seizure in EMS when IV access is available?

• A. Midazolam IV
• B. Diazepam IV
• C. Lorazepam IM
• D. Phenytoin IV

Answer: (A)

In acute seizures, the goal is rapid termination of the seizure by enhancing GABAergic inhibition. When IV access is available, a fast-acting benzodiazepine given IV is preferred because it acts quickly and can be titrated in small increments to stop the seizure.

Midazolam given by IV works rapidly, often within minutes, and its effects can be carefully dose-titrated to achieve seizure cessation with minimal oversedation. It also tends to cause less venous irritation than diazepam’s IV formulation and has a relatively short duration, which helps avoid prolonged sedation if the airway isn’t immediately secured.

Diazepam IV is effective but can irritate the vein and has a redistribution profile that can lead to seizure recurrence after an initial stop. Lorazepam IV lasts longer and can produce deeper, longer-lasting sedation, which is less desirable in the EMS setting where airway management may still be evolving. Phenytoin IV isn’t used to stop an acute seizure right away; it’s a longer-acting anticonvulsant used after benzodiazepines or for refractory cases.

So, midazolam IV is the best choice when IV access is available for acute seizures because of its rapid, controllable action and favorable safety profile in the prehospital context.