[Translated article] N-acetylcysteine: 50 years since the discovery of an antidote that has changed the prognosis of acetaminophen poisoning.
Level 5 - mechanism / opinion, no new human data
Narrative historical review without systematic search methodology or original data
PubMed 41318245 · doi:10.1016/j.farma.2025.10.015
What was done
This narrative historical review summarizes the 50-year history, mechanism of hepatotoxicity, and clinical evolution of N-acetylcysteine as an antidote for acetaminophen overdose since its introduction in 1974.
What was found
The abstract reports a historical and mechanistic narrative rather than primary numerical data. It notes key milestones including the identification of acetaminophen-induced fulminant hepatic necrosis in 1966, the elucidation of cytochrome P450-mediated metabolism to N-acetyl-p-benzoquinoneimine (NAPQI) causing glutathione depletion in the early 1970s, and the Rumack-Matthew nomogram in 1975. It also highlights modern protocol updates, such as the Scottish and Newcastle Acetylcysteine Protocol and the Two Bags regimen, which simplified administration and reduced anaphylactoid reactions. No quantitative outcome metrics or statistical values are reported.
Why it matters
It outlines the historical foundation and mechanism of the gold-standard treatment for acetaminophen overdose while highlighting modern dosing regimens that improve tolerability and reduce adverse reactions.
Limits
This is a narrative historical review rather than a systematic review or primary clinical study. The abstract contains no primary data, sample sizes, comparator groups, effect sizes, or quantitative safety/efficacy endpoints.
Cited by
- supports N-acetylcysteine (NAC) acts as the antidote to acetaminophen (Tylenol) hepatotoxicity by restoring depleted glutathione levels.