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Related Experiment Videos

Stupor from lamotrigine toxicity.

M Sbei1, J V Campellone

  • 1Department of Neurology, University of Utah School of Medicine, Salt Lake City, Utah, USA.

Epilepsia
|September 14, 2001
PubMed
Summary

Acute lamotrigine (LTG) poisoning can cause severe encephalopathy. This condition is reversible upon LTG discontinuation, highlighting the importance of considering LTG toxicity in patients with altered mental status.

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Area of Science:

  • Neuroscience
  • Clinical Toxicology
  • Pharmacology

Background:

  • Lamotrigine (LTG) is an anticonvulsant medication used to treat epilepsy and bipolar disorder.
  • Acute poisoning with LTG can occur following overdose.
  • Encephalopathy is a general term for brain dysfunction.

Observation:

  • A 55-year-year-old female presented with stupor after an overdose of lamotrigine (LTG) and valproic acid (VPA).
  • Laboratory evaluations revealed elevated serum LTG levels.
  • No other cause for the encephalopathy was identified.

Findings:

  • Discontinuation of LTG led to a complete recovery of neurological function.
  • The patient's mental status improved as serum LTG levels decreased.
  • This case suggests a potential causal link between LTG overdose and severe encephalopathy.

Implications:

  • Acute lamotrigine poisoning can induce severe, yet reversible, encephalopathy.
  • Clinicians should consider LTG toxicity in patients presenting with depressed mental status, especially those on LTG therapy.
  • This previously undescribed phenomenon expands the known spectrum of LTG toxicity.

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