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Clinical features of acetaminophen toxicity
C J McClain1, J Holtzman, J Allen
1Department of Medicine, Lexington VA Medical Center, Kentucky.
Journal of Clinical Gastroenterology
|February 1, 1988
Summary
Severe acetaminophen toxicity can occur from both intentional overdoses and accidental therapeutic misadventures. Chronic alcohol use and certain medications increase risk, especially when combined with starvation, worsening liver damage.
Area of Science:
- Toxicology
- Hepatology
- Pharmacology
Background:
- Acetaminophen (N-acetyl-p-aminophenol) overdose is a leading cause of acute liver failure.
- Understanding risk factors and clinical presentations of acetaminophen toxicity is crucial for patient management.
Observation:
- This study analyzed 13 patients with severe acetaminophen hepatotoxicity over 5 years.
- Patients were divided into two groups: therapeutic misadventure (n=6) and suicide attempt (n=7).
- Comorbidities like chronic alcoholism and use of enzyme-inducing drugs were noted in both groups.
Findings:
- Therapeutic misadventure patients were more likely to be chronic alcoholics (5/6) and take inducing drugs (3/6).
- Nausea, vomiting, or starvation were more prevalent in the therapeutic misadventure group (6/6), potentially depleting glutathione and increasing liver injury.
- Acute tubular necrosis occurred in 4/6 patients with therapeutic misadventure versus 2/7 in the suicide group.
Implications:
- Clinicians must recognize the diverse clinical spectrum of acetaminophen toxicity.
- Risk stratification should consider alcohol use, concomitant medications, and nutritional status.
- Prompt identification and management are vital to improve outcomes in severe acetaminophen poisoning.