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Lamotrigine-induced seizures in a child: case report and literature review

Josef G Thundiyil1, Ilene B Anderson, Pamela J Stewart

  • 1School of Medicine, University of California, San Francisco, CA 94143-1369, USA. joseft@mindspring.com

Clinical Toxicology (Philadelphia, Pa.)
|March 17, 2007
PubMed

Insights

Pediatric lamotrigine overdose can cause seizures, even with levels only moderately above therapeutic ranges. This case highlights potential risks in children and questions the clinical utility of serum levels in overdose prediction.

Area of Science:

  • Clinical Toxicology
  • Pediatric Neurology
  • Pharmacovigilance

Background:

  • Lamotrigine is a widely used antiepileptic drug.
  • Limited data exists on lamotrigine overdose in pediatric populations.
  • Previous reports of seizures in lamotrigine overdose are scarce.

Observation:

  • A 19-month-old boy experienced generalized seizures after ingesting an unknown quantity of lamotrigine tablets.
  • The child presented with tachycardia and miosis.
  • Serum lamotrigine level was significantly elevated at 20.3 mg/L, approximately five times the upper limit of the therapeutic range.

Findings:

  • This case report details lamotrigine-induced seizures in a pediatric patient.
  • Serum lamotrigine levels in overdose may not reliably predict clinical outcomes.
  • The pediatric population might be more susceptible to seizures from lamotrigine poisoning.

Implications:

  • Clinicians should consider lamotrigine toxicity in pediatric patients presenting with seizures.
  • Further research is needed to establish safe pediatric dosing and overdose management guidelines.
  • Enhanced awareness of lamotrigine's seizure risk in children is crucial for emergency medicine and toxicology.
Abstract

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