Today, I review, link to, and excerpt from Emergency Medicine Cases‘ “Ep 213 Update in Management of Status Epilepticus”.*
*Helman, A. Gray, S. Update in Management of Status Epilepticus. Emergency Medicine Cases. February, 2026. https://emergencymedicinecases.com/upate-management-status-epilepticus. Accessed May 26, 2026
All that follows is from the above resource.
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Convulsive status epilepticus is one of the most morbid neurologic emergencies we manage in the ED, and outcomes depend far more on speed than drug selection. Like ventricular fibrillation, each minute of ongoing convulsions worsens hypoxia, acidosis, cardiovascular instability, and neuronal injury, while making seizures progressively harder to terminate. Modern definitions are intentionally time-compressed to force early, parallel, clock-anchored action. Any patient still convulsing when you reach the bedside should be treated as evolving status epilepticus.
In this EM Cases podcast with Dr. Sara Gray, we take a practical, time-based approach to convulsive status epilepticus, focusing on early, adequately dosed benzodiazepines, avoiding common escalation and dosing pitfalls, anticipating post-ictal cardiovascular collapse, and knowing when to escalate to second-line agents, airway control, and anesthetic-dose therapy. We also address the transition to non-convulsive status epilepticus and how to recognize ongoing seizures when EEG is not immediately available.
We answer questions such as: Why does time to first benzodiazepine matter more than the drug or route? What critical actions should occur in parallel with the first dose? Why is underdosing second-line antiseizure medications—especially levetiracetam—a common and dangerous pitfall? What are 3 key actions to do in parallel with the first benzodiazepine? When should persistent seizures trigger intubation and anesthetic-dose therapy? How can we identify non-convulsive status epilepticus once tonic-clonic activity stops? And many more (we also include a high yield status epilepticus management algorithm!)…
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Make a donation here: https://emergencymedicinecases.com/donation/Why management of status epilepticus is a race against time
Convulsive status epilepticus (CSE) is one of the most destructive neurologic emergencies we see in the ED, with high risks of death and long‑term disability when seizures are not shut down quickly. Prolonged seizures drive acidosis, cardiovascular collapse, and neuronal injury; outcomes track closely with both total seizure duration and time to first benzodiazepine. Modern definitions and management aim to make us act earlier, anchor decisions to the clock, and anticipate post‑ictal physiologic collapse rather than reacting late.
Working definition of convulsive status epilepticus
- Generalized tonic–clonic activity lasting >5 minutes, or
- Recurrent seizures without recovery of baseline neurologic function between events.
Most isolated seizures terminate within 1–3 minutes, but beyond a few minutes, GABA receptors internalize and excitatory pathways upregulate, making seizures self‑perpetuating and benzodiazepine‑resistant. Any patient still convulsing by the time you are at the bedside should be presumed to be in status and treated as such.
First five minutes: parallel actions and first‑line benzodiazepines
Time to first benzodiazepine is the key determinant of outcomes
The key determinant of success in management of status epilepticus is time to first benzo, not which benzo or route you choose. Early treatment reduces total dose needed and lowers the chance of progression to refractory status; delaying “to see if it stops” exposes the patient to more apnea, hypoxia, hypotension, and neuronal injury than the drug does.
Decision to Initiate the First Benzodiazepine
The decision to administer the first benzodiazepine should be guided by ongoing seizure activity at the point of clinical intervention, rather than strict adherence to a five-minute time threshold. Although many seizures self-terminate within one to three minutes, by the time emergency care is initiated a patient who is still seizing has effectively declared evolving status epilepticus. Delaying treatment to observe for spontaneous resolution risks progression to pharmacoresistant seizures, as prolonged convulsions are associated with reduced benzodiazepine responsiveness and increasing excitatory neurotransmission. Importantly, respiratory depression and hypotension are more strongly linked to ongoing seizure activity than to early, adequately dosed benzodiazepines, supporting prompt and decisive first-line treatment once seizure activity persists.
Think parallel, not sequential. From the moment you recognize ongoing convulsions, call for help, assign roles, and start a team-visible timer; our perception of time compresses dramatically during seizures.
Key actions to do in parallel with the first benzodiazepine
- Check capillary glucose A-B-C– D‑E‑F‑G: “Don’t Ever Forget Glucose.”
- Send a STAT VBG with electrolytes, specifically to screen for severe hyponatremia or other life‑threatening metabolic derangements early – this will alter management significantly (see below)
- Anticipate post‑ictal hypotension: have norepinephrine mixed and ready; many patients will need vasopressor support once the seizure and catecholamine surge terminate, especially after adequate benzo and propofol dosing.
Benzodiazepines (0–5 minutes)
- Preferred: Lorazepam 4 mg IV push (consider 8mg in patients with alcohol or benzodiazpeine withdrawal seizures and those with high BMI); some experts recommend 2mg IV in rapid succession for repeat every 2–3 minutes to a total up to about 8 mg in large, tolerant, or alcohol‑use‑disorder patients.
- Alternative IV: Midazolam 5–10 mg IV; be prepared for repeat dosing or infusion because of its shorter CNS effect.
- No IV access: Midazolam 10 mg IM; prehospital RCTs show IM midazolam is at least as effective as IV benzos when you factor in earlier delivery.
Pearl: Ask for multiple pre‑drawn benzo doses up front so you can redose every 2–3 minutes without pharmacy trips or hesitation.
Second 5 minutes (5–10): second‑line antiseizure meds and reversible causes
By 5 minutes of ongoing convulsions, your patient meets the modern definition of status and should already be loading a second‑line antiseizure medication. Do not wait to “see what the benzo does” once you cross this time point.
Time‑anchored escalation framework in management of status epilepticus
- 0–5 minutes: Benzodiazepines
- 5–10 minutes: Second‑line IV antiseizure medication
- 10–15 minutes: Intubation and anesthetic‑dose therapy
Evidence‑supported second‑line options in the management of status epilepticus
Large multicenter trials (e.g., ESETT) suggest equivalent efficacy between the major second‑line agents when used at full doses.
Common Pitfall: A common pitfall is underdosing 2nd line medications. Second‑line doses are intentionally large; full loading (especially levetiracetam 60 mg/kg) is necessary to portend the best chance of terminating status.
Reversible precipitants/causes of status epilepticus to address in parallel
Do not delay antiseizure therapy while chasing causes, but treat likely reversible drivers early.
- Hypoglycemia: Give IV dextrose immediately.
- Hyponatremia: Give 3% saline 100 mL IV boluses; where hypertonic saline is unavailable, repeated amps of sodium bicarbonate can provide an alternative sodium load.
- Eclampsia: Magnesium sulfate 4–6 g IV over ~15 minutes, then infusion; antihypertensives in parallel; watch for hypotension and be ready with norepinephrine.
- Hypertensive encephalopathy: Control BP with labetalol boluses (e.g., 20 mg) or nicardipine infusion, depending on local availability.
- Toxicologic etiologies: Consider sodium channel blocker toxicity, isoniazid, etc. and use targeted antidotes where applicable.
