Fomepizole Therapy for Acetaminophen-Induced Liver Failure in an Infant

Area of Science:

• Pediatric Toxicology
• Hepatology
• Pharmacology

Background:

• Acetaminophen overdose is a frequent pediatric concern.
• N-acetylcysteine (NAC) is the standard antidote but delays increase hepatotoxicity risk.
• Fomepizole's mechanism suggests potential benefit by inhibiting toxic metabolite formation and oxidative stress.

Purpose of the Study:

• To describe the use of fomepizole in conjunction with NAC in a pediatric patient with severe acetaminophen toxicity.
• To evaluate the safety and efficacy of this combined approach in a high-risk pediatric case.

Main Methods:

• A case report of a 7-month-old female with acute liver failure due to repeated supratherapeutic acetaminophen dosing.
• Treatment involved both N-acetylcysteine (NAC) and fomepizole.
• Clinical presentation and outcome were monitored.

Main Results:

• The patient presented with acute liver failure and persistently high acetaminophen levels.
• Despite initial markers of poor prognosis, the patient fully recovered following combined NAC and fomepizole therapy.
• No adverse events were reported from the combined antidote administration.

Conclusions:

• This case suggests that fomepizole may be a safe and beneficial adjunct to NAC in pediatric acetaminophen overdose.
• Further research, including randomized trials, is warranted to confirm fomepizole's role in severe pediatric acetaminophen toxicity.