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Related Experiment Videos

Paracetamol overdose in a preterm neonate.

G K Isbister1, I K Bucens, I M Whyte

  • 1Royal Darwin Hospital, Northern Territory, Australia. gsbite@bigpond.com

Archives of Disease in Childhood. Fetal and Neonatal Edition
|June 23, 2001
PubMed
Summary

A premature neonate survived an accidental paracetamol overdose due to slow metabolism. Treatment with activated charcoal, N-acetylcysteine, and supportive care prevented liver damage, highlighting low paracetamol toxicity in neonates.

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Area of Science:

  • Neonatal pharmacology
  • Pediatric toxicology
  • Clinical pharmacology

Background:

  • Paracetamol (acetaminophen) is a common analgesic and antipyretic.
  • Neonatal paracetamol toxicity data is limited, with unclear risks.
  • Premature infants have altered pharmacokinetic profiles.

Observation:

  • A 55-day-old, 29-week premature neonate accidentally received a 136 mg/kg oral dose of paracetamol.
  • Treatment involved activated charcoal, N-acetylcysteine, and supportive care.
  • No biochemical evidence of hepatotoxicity or long-term sequelae was observed.

Findings:

  • Calculated pharmacokinetic variables (t(abs), V/F(oral), CL/F(oral)) were consistent with population data.
  • An increased plasma half-life (Tbeta) of 5.69 hours reflected normal infant metabolism, not toxicity.
  • Neonatal paracetamol toxicity appears low due to slow oxidative metabolism and rapid glutathione synthesis.

Implications:

  • Paracetamol overdose toxicity in neonates may be lower than in adults.
  • Dose and plasma half-life can estimate toxicity in neonatal overdose.
  • N-acetylcysteine remains a crucial treatment for paracetamol poisoning in neonates.

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