By Dr. Sabrina Berdouk, peer-reviewed by Abdolghader Pakniyat

Scope: Generalized convulsive status epilepticus in infants older than one month and children. Neonatal seizures require a separate neonatal pathway. The ESETT comparison of levetiracetam, fosphenytoin and valproate specified eligibility from age 2 years; its results should not be extrapolated uncritically to younger infants.

You’re midway through a crowded shift. Monitors beeping, stretchers moving, voices layered over each other in the controlled chaos we call normal. Then the doors open and everything narrows.

A parent rushes in, eyes wide with fear, holding a child who is still seizing.
And in that instant, the noise fades, the room sharpens, and the only thing that matters… is the clock.

Stabilize and prepare treatment immediately. Count seizure time from onset, including the prehospital period. Treat ongoing generalized convulsions at 5 minutes; if duration is unknown or cardiorespiratory compromise is present, treat immediately. RCH guidance.

At 5 minutes, for generalized convulsive seizures in kids, this is status epilepticus.
And the clock is now against the brain.

What Do We Actually Mean by Status Epilepticus?

For generalized convulsive status epilepticus:

• Seizure ≥5 minutes
• OR recurrent seizures without return to baseline

Two operational time points guide treatment:

• t1 ≈ 5 minutes: start treatment.
• t2 ≈ 30 minutes: an estimate for increasing risk of long-term consequences, not a precise injury threshold or a reason to wait. ILAE definition.

In children, think even simpler:

A generalized tonic–clonic seizure still ongoing at 5 minutes
= treat as status epilepticus. No debate.

Why 5 Minutes Matters

Prolonged seizures can become harder to stop:

• Experimental studies show loss of synaptic GABA-A receptors, which can reduce inhibition and benzodiazepine responsiveness. Mechanistic study.
• Changes in glutamate receptors can sustain excitation. These mechanisms do not define a bedside countdown. Receptor-trafficking review.
• Hypoxia and circulatory compromise can add secondary injury; reassess oxygenation, ventilation and perfusion throughout treatment.

Delayed or underdosed treatment can contribute to prolonged seizures and treatment resistance; refractory status can also occur despite prompt, appropriate care.

Minute 0–5: The Moment That Changes Everything

Stabilize and treat in parallel:

Airway, breathing and circulation: position the airway, suction accessible secretions and give oxygen. Use bag-mask ventilation if breathing is inadequate. Monitor ECG, oxygen saturation and blood pressure; have resuscitation equipment ready.

Glucose and access: check bedside glucose immediately, correct hypoglycemia using the pediatric protocol and recheck after treatment. Obtain IV access; consider IO access if needed. Do not delay a non-IV benzodiazepine while trying to place a cannula. CPS guidance.

First-line treatment is a benzodiazepine:

A full, weight-based benzodiazepine.
Given early and at the correct route-specific dose. Count adequate benzodiazepine doses already given by caregivers or EMS before deciding whether another dose is appropriate.

The IV benzodiazepine doses below follow AES guidance; the IM/intranasal midazolam example follows CPS guidance. Confirm the locally approved route, formulation, administration rate and dose before giving medication.

Under a monitored convulsive-status protocol, if still seizing 5 minutes after an adequate benzodiazepine dose, a second dose may be given; count doses given before arrival and escalate after two adequate doses. This emergency sequence is distinct from the rectal-gel product’s prescribed outpatient seizure-cluster repeat schedule. Follow the applicable protocol with airway and cardiorespiratory monitoring. CPS guidance.

Then something critical must happen:

You must move on.

Minute 10–30: Where Systems Beat Intentions

If seizures persist after two adequate benzodiazepine doses, start one full second-line loading dose promptly. The three regimens below use ESETT doses for patients aged ≥2 years; use the local pediatric pathway, particularly in younger infants. Review maintenance antiseizure therapy and doses already given before choosing a load.

• Levetiracetam 60 mg/kg IV (max 4.5 g), infused over 10 minutes; or
• Fosphenytoin 20 mg PE/kg IV (max 1500 mg PE), infused over 10 minutes. PE means phenytoin sodium equivalents. Pediatric infusion rate: no faster than 2 mg PE/kg/min or 150 mg PE/min, whichever is slower. Continuously monitor ECG, blood pressure, and respiratory function during and after infusion. Prescribing information.
• Valproate 40 mg/kg IV (max 3 g), infused over 10 minutes. Contraindicated with known POLG-related mitochondrial disease, suspected mitochondrial disease in children under 2 years, hepatic disease or significant hepatic dysfunction, or a known urea-cycle disorder. Age under 2 years alone carries a higher hepatotoxicity risk and requires extreme caution; it is not an absolute contraindication by age alone. In pediatric emergency care, avoid valproate when mitochondrial disease is suspected and obtain urgent specialist advice. Drug label; CPS guidance.
• Phenobarbital is an alternative under the local pediatric pathway. The CPS regimen is 20 mg/kg IV, maximum 1 g, over 20 minutes. Anticipate respiratory depression, hypotension and sedation, especially after benzodiazepines.

In ESETT, about half of children had seizure cessation with improving consciousness at 1 hour without additional medication; no efficacy difference was detected. Phenobarbital was not compared. Choose using contraindications, age, availability and the local pathway.

Prepare the next medication while the current treatment is being given. Record doses, timing and response, and reassess airway and circulation at every step. CHOP pathway.

Pediatric observational research found treatment delays associated with out-of-hospital onset and intermittent seizures. It does not establish hesitation as the universal cause. Treatment-delay study.

If seizures continue despite adequate benzodiazepine treatment and a full second-line loading dose, obtain urgent PICU/neurology and airway support. Escalate promptly under the local pathway; do not wait for an arbitrary 30-minute threshold. Expert-guided options include another second-line agent or anesthetic therapy, selected according to seizure persistence and the child’s respiratory and hemodynamic status. CPS; NICE.

Refractory Status Epilepticus: Recognize Treatment Failure Early

Refractory status epilepticus means seizures continue despite adequate benzodiazepine treatment and an appropriately dosed second-line antiseizure medication. It is defined by treatment failure, not elapsed time alone.

Involve PICU, neurology, and airway specialists early. If anesthetic therapy is selected, provide appropriate airway protection, ventilation, hemodynamic support, and continuous EEG monitoring. When EEG is unavailable locally, arrange specialist-guided access or transfer while continuing urgent treatment of clinically apparent seizures.

Infusion options below require a specialist-led PICU protocol; they are not an automatic next step solely because 30 minutes have passed.

• Midazolam:
  • Bolus 0.2 mg/kg IV
  • Start infusion at 0.1 mg/kg/hour; titrate within the specialist protocol (published range 0.1–2 mg/kg/hour) to EEG-guided seizure control. Burst suppression is a specialist-selected target, not an automatic requirement. AES review.
• Propofol: specialist decision only. It is not indicated for pediatric ICU sedation, and there is no established “older than 8–10 years” safety cutoff for an infusion. Any off-label use for refractory status epilepticus requires pediatric critical-care/anesthesia expertise, continuous EEG and cardiorespiratory monitoring, and a written protocol specifying dose, duration and propofol-infusion-syndrome monitoring. Older age or short duration does not eliminate that risk; no general pediatric infusion range is specified here. Prescribing information; AES refractory-status review.
• Ketamine or barbiturate infusion (e.g., pentobarbital/thiopental)
  • Selected by PICU/neurology according to treatment response and physiology; the list does not require trying propofol first.

Investigate and treat reversible causes in parallel from arrival, without delaying seizure treatment. If consciousness does not recover as expected after convulsions stop, or neuromuscular blockade masks motor activity, seek urgent EEG and neurology input for possible nonconvulsive seizures.

Why did this child seize?

Infection.
Electrolytes.
Toxins.
Trauma.
Autoimmune disease.
Hypoxia.
Medication levels.

Stopping the seizure is lifesaving.
Finding the cause is future-saving.

The Pitfalls We Still See — Even in Excellent Departments

Not from lack of care.
But because emergency medicine is human.

• Waiting past 5 minutes
• Underdosing benzodiazepines
• Repeating benzos instead of escalating
• Delayed second-line loading
• Missing reversible causes
• No clear time-based bedside pathway

Review each delay: recognition, access, medication preparation and team coordination all deserve attention. Avoid assuming a single cause.

The Quiet Truth

The first minutes give the emergency team an opportunity to change the course of care.

The emergency team can improve care through prompt, adequately dosed treatment. Outcome also depends on the underlying cause, seizure duration and the child’s overall condition.

The Take-Home

5 minutes → Treat.
Promptly load a second-line medication when adequate benzodiazepines fail.
Ongoing seizures after adequate benzodiazepine + second-line treatment → urgent PICU/neurology escalation, airway assessment, and further treatment under the local refractory-status pathway. Do not wait for 30 minutes.

No hesitation.
No underdosing.
No delay.

Because in pediatric status epilepticus:

Treat promptly. Reassess the child. Escalate when treatment fails.

Follow the approved local pediatric pathway. AES, ESETT and CPS differ; do not combine these examples into one protocol.