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Paracetamol poisoning in children and hepatotoxicity
1Paediatric Pharmacology Unit, Westmead Hospital, Sydney, Australia.
Insights
Paracetamol poisoning is rare in children, but chronic use may pose risks. Re-evaluating frequent therapeutic doses in infants and young children is crucial for safety.
Area of Science:
- Pediatric Pharmacology
- Toxicology
- Drug Safety
Background:
- Paracetamol (acetaminophen) is a common medication for children's pain and fever.
- Accidental ingestion is frequent, but severe outcomes like hepatotoxicity and death are rare in pediatric cases.
- Developmental differences in metabolism and detoxification may contribute to lower susceptibility in children.
Purpose of the Study:
- To review and analyze pediatric cases of paracetamol poisoning.
- To investigate the safety profile of paracetamol in children, particularly concerning chronic use.
- To re-evaluate the safety margin of therapeutic paracetamol doses in infants and young children.
Main Methods:
- Literature review of reported pediatric cases of paracetamol poisoning.
- Analysis of case details focusing on acute versus chronic poisoning.
- Examination of factors contributing to hepatotoxicity and mortality in children.
Main Results:
- Seven deaths and fourteen cases of hepatotoxicity were identified in the literature.
- Most severe cases resulted from chronic paracetamol poisoning, not acute overdose.
- The safety margin for frequent therapeutic paracetamol doses in young children appears narrower than previously assumed.
Conclusions:
- While acute paracetamol poisoning is uncommon in children, chronic administration warrants careful consideration.
- Developmental factors influencing paracetamol metabolism in children require further investigation.
- The safety of chronic paracetamol therapy in infants and young children needs re-evaluation.
Abstract:
1. Paracetamol is one of the most common drugs that children accidentally ingest. Unlike the situation in adults, death and hepatotoxicity in children from paracetamol poisoning are exceedingly uncommon events. A review of the literature has revealed only seven deaths and fourteen cases of hepatotoxicity in children, with most of the cases resulting from chronic poisoning and not acute poisoning. 2. Children may be less prone to paracetamol hepatotoxicity because of developmental differences in the drug's metabolism and its pathways of detoxification. In the therapeutic setting of treatment of fever and pain in children, paracetamol is regarded as a drug with a higher therapeutic index, and as such, there seems to be little concern with strict adherence to dosage regimes. 3. Scrutiny of the above paediatric cases associated with chronic paracetamol poisoning suggests that the margin of safety of frequent therapeutic doses of paracetamol in infants and young children to be a lot lower than previously appreciated. This review highlights the need to re-evaluate the safety of paracetamol in the context of chronic therapy in infants and young children.