Iatrogenic topiramate poisoning in an ICU patient: Focus on topiramate peak time prolongation

V.M.G. Hoebregts, N. Foudraine, P.K.C. Janssen, J.L.M.L. le Noble*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review


A 35-year-old man with generalized insults was admitted to the intensive care unit because of third-line treatment of persistent epileptic insults with antiepileptic drug therapy. Topiramate was added on top of his outpatient regimen in combination with intravenous antiepileptic drugs. Miscommunication and inappropriate topiramate dosing (2,500 mg twice) resulted in an acute topiramate intoxication. Toxicokinetic assessment showed toxic serum topiramate concentration of 55 mg/L and a dose-dependent shift of peak time t(max). According to our modulations, t(max) follows Y = 0.0009X + 2.65, where X is the topiramate dose. Our results have important implications for effectiveness of gut decontamination modalities.
Original languageEnglish
Pages (from-to)784-786
Number of pages3
JournalInternational Journal of Clinical Pharmacology and Therapeutics
Issue number12
Publication statusPublished - 1 Dec 2021


  • toxicokinetics
  • topiramate
  • poisoning
  • ICU
  • therapeutic drug monitoring

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