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Reported dose as a measure of drug exposure after paracetamol overdose in children

Katharine J Rutter1, Tim Ubhi, Dominic Smith

  • 1Acute Medical Unit, York Teaching Hospital, NHS Foundation Trust, York, UK.

Current Clinical Pharmacology
|October 16, 2012
PubMed

Insights

The reported dose of paracetamol is a reliable indicator of toxicity in children following overdose. This study confirms its importance in initial risk assessment when laboratory results are delayed or unavailable.

Area of Science:

  • Pediatric Toxicology
  • Clinical Pharmacology

Background:

  • Paracetamol overdose management relies on assessing drug exposure, often using the reported dose.
  • Limited data exist on the accuracy of reported doses in pediatric paracetamol poisoning.

Purpose of the Study:

  • To investigate the correlation between reported paracetamol dose and serum concentrations in pediatric patients.
  • To validate the use of reported dose in the initial risk assessment of paracetamol overdose in children.

Main Methods:

  • Observational study of pediatric patients (≤18 years) admitted with paracetamol overdose.
  • Analysis of reported paracetamol dose (mg/kg) and measured serum paracetamol concentrations.
  • Statistical correlation analysis (Spearman's rho) between dose and estimated 4-hour concentration.

Main Results:

  • A significant positive correlation was found between the reported paracetamol dose and the equivalent 4-hour serum concentration (Spearman's rho=0.57, P<0.0001).
  • The study included 61 evaluable cases with a median age of 14 years.

Conclusions:

  • The reported dose of paracetamol is a valuable tool for initial risk assessment in pediatric overdose cases.
  • This finding is particularly relevant in scenarios where timely laboratory determination of serum concentrations is challenging, such as with staggered ingestions.

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