Acetaminophen. Concepts and controversies

Area of Science:

• Toxicology
• Hepatology
• Pharmacology

Background:

• Acetaminophen (APAP) poisoning remains a significant public health concern.
• Despite the availability of N-acetylcysteine (NAC) as a specific antidote, fatalities due to APAP overdose continue to occur.
• Current understanding of optimal NAC treatment strategies, including indications, administration, dosage, and duration, requires further elucidation.

Purpose of the Study:

• To review current understanding and identify gaps in the diagnosis and treatment of APAP poisoning.
• To explore recent advances in the understanding of NAC's mechanism of action and its role in late-stage treatment.
• To highlight immediate challenges in managing APAP toxicity, particularly after repeated ingestions and in cases of hepatic failure.

Main Methods:

• Literature review of recent advances in APAP poisoning management.
• Analysis of traditional and evolving concepts in NAC therapy.
• Identification of critical areas requiring further clinical investigation and protocol refinement.

Main Results:

• Early NAC treatment is highly effective in preventing liver injury.
• Significant knowledge gaps persist regarding optimal NAC indications, route, dosage, and duration.
• Recent advances have challenged traditional views on late-stage NAC treatment and its mechanisms.

Conclusions:

• Optimizing NAC treatment protocols is essential to reduce fatalities from APAP poisoning.
• Further research is needed to refine diagnosis and treatment strategies for complex APAP toxicity scenarios.
• Improving therapeutic approaches for APAP-induced hepatic failure remains a critical challenge.