Lorazepam Pediatric Dose — Seizure Management
Lorazepam is a benzodiazepine anticonvulsant that enhances GABAergic inhibition to rapidly terminate seizure activity. It is a first-line agent for the acute management of seizures lasting longer than 5 minutes in pediatric patients. Its favorable duration of action and predictable pharmacokinetics make it well-suited for emergent use in both inpatient and prehospital settings.
Pediatric Dosing
For seizures lasting longer than 5 minutes, administer 0.1 mg/kg IV per dose. The maximum single dose is 4 mg. The dose may be repeated as needed every 10–15 minutes if seizure activity persists.
- Dose: 0.1 mg/kg IV
- Maximum single dose: 4 mg
- Repeat interval: Every 10–15 minutes as needed
- Indication threshold: Seizures > 5 minutes in duration
Worked example: For a 20 kg child: 20 × 0.1 mg/kg = 2 mg IV per dose (well within the 4 mg maximum). For a 50 kg adolescent: 50 × 0.1 mg/kg = 5 mg, capped at the 4 mg maximum.
Indications and Clinical Context
Lorazepam is indicated for acute seizures exceeding 5 minutes in duration, consistent with the definition of status epilepticus used in PALS and standard emergency guidelines. Benzodiazepines represent the first-line pharmacologic intervention in this context, with IV lorazepam widely supported as an effective and titratable option for terminating prolonged seizure activity in pediatric patients.
Prompt treatment is critical, as seizure duration correlates with increasing resistance to anticonvulsant therapy and risk of neurologic injury. Lorazepam’s onset of action following IV administration is typically within 2–5 minutes, making it appropriate for acute resuscitative use in the emergency department and PICU settings.
Administration and Monitoring
Administer lorazepam as a slow IV push. If IV access is unavailable, consult institutional protocol regarding alternative routes. Monitor continuously for respiratory depression, hypotension, and oversedation, particularly with repeat dosing. Airway management equipment should be immediately available prior to administration.
- Route: IV (per this dosing guidance)
- Administration: Slow IV push
- Max single dose: 4 mg regardless of weight
- Repeat dosing: Every 10–15 minutes as clinically indicated
- Key monitoring: Respiratory rate, oxygen saturation, blood pressure, level of consciousness
- Contraindications: Acute narrow-angle glaucoma; use with caution in patients with pre-existing respiratory compromise
Disclaimer: This article is an educational reference summarizing standard pediatric dosing values. It is not a substitute for clinical judgment. Always verify doses against institutional protocols, the current edition of authoritative references (e.g., Lexicomp, Harriet Lane Handbook, PALS guidelines), the patient’s accurate weight, and any patient-specific factors (renal/hepatic function, allergies, comedications) before administration.