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Status epilepticus after massive carbamazepine overdose.
Henry A Spiller1, Richard D Carlisle
1Kentucky Regional Poison Center of Kosair Children's Hospital, Louisville 40232-5070, USA. henry.spiller@nortonhealthcare.org
Journal of Toxicology. Clinical Toxicology
|May 7, 2002
Summary
Carbamazepine overdose can cause severe, prolonged seizures (status epilepticus) resistant to standard treatments. This condition, sometimes accompanied by wide complex tachycardia, highlights the need for alternative therapeutic strategies in managing overdose toxicity.
Area of Science:
- Neurology
- Clinical Toxicology
Background:
- Carbamazepine is a commonly prescribed anticonvulsant and mood-stabilizing medication.
- Overdoses of carbamazepine can lead to serious neurological and cardiovascular complications.
- Status epilepticus is a neurological emergency characterized by prolonged or recurrent seizures.
Observation:
- Two cases of status epilepticus following carbamazepine overdose are presented.
- The first patient, an 18-year-old female with epilepsy, experienced prolonged seizures refractory to sodium amytal, leading to death.
- The second patient, an 18-year-old male with bipolar disorder, had seizures resistant to diazepam, phenytoin, and phenobarbital, but responded to midazolam infusion.
Findings:
- Status epilepticus is a potential complication of carbamazepine overdose.
- Seizures in carbamazepine overdose may be refractory to conventional antiepileptic drugs.
- Wide complex tachycardia was observed in association with status epilepticus in one case.
Implications:
- Carbamazepine overdose necessitates vigilant monitoring for status epilepticus.
- Treatment of status epilepticus in carbamazepine overdose may require non-standard or escalated therapeutic approaches.
- This report highlights the potential for severe, treatment-resistant seizures and associated cardiac complications following carbamazepine toxicity.