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Management of acetaminophen toxicity
1East Carolina University School of Medicine, Greenville, North Carolina, USA.
American Family Physician
|January 1, 1996
Summary
Acetaminophen poisoning causes liver damage due to a toxic metabolite when glutathione is depleted. Treatment involves preventing absorption, using the antidote N-acetylcysteine, and supportive care.
Area of Science:
- Toxicology
- Hepatology
- Pharmacology
Background:
- Acetaminophen (APAP) overdose is a common cause of acute liver injury in the US.
- Hepatotoxicity results from large single doses or smaller doses in individuals with altered drug metabolism.
- The toxic intermediate N-acetyl-p-benzoquinoneimine (NAPQI) accumulates when hepatic glutathione is depleted, causing hepatocellular damage.
Purpose of the Study:
- To summarize the pathophysiology and management of acetaminophen poisoning.
- To highlight the role of family physicians in managing this condition.
Main Methods:
- Review of existing literature on acetaminophen poisoning.
- Discussion of the mechanism of hepatotoxicity.
- Outline of current treatment strategies.
Main Results:
- Acetaminophen-induced liver injury is mediated by NAPQI accumulation.
- Hepatic glutathione depletion is a key factor in toxicity.
- Effective management includes gastrointestinal decontamination, N-acetylcysteine (NAC) administration, and supportive care.
Conclusions:
- Acetaminophen poisoning is a serious, yet treatable, condition.
- Early recognition and intervention with N-acetylcysteine are crucial for preventing severe liver damage.
- Family physicians play a vital role in the timely management of acetaminophen overdose.