Background The prevalence and characteristics of acetaminophen-associatedliver injury in hospitalized patients are not well defined.
Methods We identified patients hospitalized for excessive acetaminopheningestion at an urban county hospital over a 40-month period(1992 to 1995) and reviewed their medical records to determinethe incidence and clinical features of the ingestions and theiroutcomes.
Results Of the 71 patients studied, 50 were classified as havingtaken acetaminophen during suicide attempts and 21 as havingaccidentally poisoned themselves while attempting to relievepain. The suicidal patients had ingested almost twice as muchacetaminophen as those in the accidental-overdose group (median,20 vs. 12 g; P = 0.009). Among the patients for whom data wereavailable, 63 percent of those in the accidental-overdose groupand 25 percent of those in the suicidal group were chronic alcoholabusers (P = 0.009). The patients in the accidental-overdosegroup more often had severe liver necrosis (aminotransferaselevels, >3500 IU per liter; 52 percent vs. 14 percent; P= 0.002) and were more likely to have hepatic coma (33 percentvs. 6 percent, P = 0.006). There were four deaths (19 percent)in the accidental-overdose group and one (2 percent) in thesuicidal group (P = 0.04). Five patients three in theaccidental-overdose group and two in the suicidal group had ingested 4 g of acetaminophen or less. Acetaminophen ingestionaccounted for 12 percent of all patients hospitalized with overdoses(71 of 589) and 40 percent of patients with acute liver failure(10 of 25) during the study period.
Conclusions In an urban county hospital, patients hospitalizedwith acetaminophen toxicity related to accidental misuse hadhigher rates of morbidity and mortality than those who attemptedsuicide, even though the latter had taken more acetaminophen.A higher frequency of chronic alcohol abuse among the patientswith accidental overdoses may be one explanation.
Source Information
From the Liver Division, Department of Internal Medicine, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX 75235-9151, where reprint requests should be addressed to Dr. Lee.
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