Clinical Report: Ambiguous Timing of Acetaminophen Intake in a Case of Adolescent Analgesic Overdose
Background
Acetaminophen toxicity is a leading cause of drug-induced liver injury and a common reason for liver transplantation. The Rumack–Matthew nomogram is the standard for managing acute acetaminophen overdoses, but its reliability diminishes with staggered or uncertain ingestion timing.
Data Highlights
Parameter
Value
Acetaminophen concentration
22.3 mg/L
Prothrombin time
20.9 s
INR
1.55
Alkaline phosphatase
309 U/L
Total bilirubin
9.5 mg/dL
Alanine aminotransferase
6.1 U/L
Aspartate aminotransferase
24.1 U/L
Key Findings
A 16-year-old male ingested 6,000 mg of acetaminophen and multiple NSAIDs.
Measured acetaminophen concentration was 22.3 mg/L, higher than expected based on reported dose.
Normal aminotransferases indicated no immediate liver injury at presentation.
N-acetylcysteine was initiated due to the clinically relevant acetaminophen concentration.
Clinical Implications
Clinicians should prioritize measured acetaminophen concentrations and laboratory evaluations in cases of suspected overdose, particularly when ingestion timing is uncertain. This approach may lead to timely and appropriate management, including the use of N-acetylcysteine.
Conclusion
This case illustrates the complexities of acetaminophen overdose management, highlighting the need for careful assessment of both reported and measured values in clinical decision-making.
