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Acute Valproic Acid Overdose

Clinical Course and Pharmacokinetic Disposition of Valproic Acid and Metabolites

  • Case Reports
  • Poisoning Management
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Summary

Acute toxicity in the setting of valproic acid (valproate sodium) overdose is in most cases benign and readily reversible. However, serious toxicity has been reported. We present a case of accidental acute valproic acid overdose in a 26-month-old female, in whom serious neurological, metabolic, haematological and respiratory sequelae occurred. The major toxicity observed was delayed cerebral oedema. We also present data not previously reported, which describes the pharmacokinetic disposition of valproic acid and several of its metabolites during the course of this acute overdose. A comparison of an enzyme immunoassay and gas liquid chromatographic methodologies for measuring valproic acid in this setting is also presented. It appears that the 2-EN-valproic acid metabolite plays a role in the neurological toxicity.

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Authors and Affiliations

  1. School of Pharmacy and Department of Pediatrics, Division of Pharmacy Practice, Beard Hall, CB# 7360, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, 27599, USA

    Robert E. Dupuis, Steven N. Lichtman & Gary M. Pollack

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  1. Robert E. Dupuis
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  2. Steven N. Lichtman
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  3. Gary M. Pollack
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Dupuis, R.E., Lichtman, S.N. & Pollack, G.M. Acute Valproic Acid Overdose. Drug-Safety 5, 65–71 (1990). https://doi.org/10.2165/00002018-199005010-00006

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  • DOI: https://doi.org/10.2165/00002018-199005010-00006

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