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Abstract
1. Acetaminophen clearance and its partial clearance to its major metabolites has been determined before and after 5 days treatment with the anti-alcohol abuse agent disulfiram (200 mg daily). The study was conducted in 10 subjects, five without liver disease and five with alcoholic cirrhosis of the liver. Acetaminophen was given i.v. at a dose of 500 mg. Plasma samples were obtained up to 8h after injection and urine collected for 24 h.
2. Across all subjects acetaminophen plasma clearance was reduced from 0.249 + 0.061 to 0.217 + 0.0661/min after disulfiram treatment (mean + SD, P0.05). Thus no change in acetaminophen dosage would be required in patients treated with disulfiram.
3. The partial clearance of acetaminophen to its glucuronide, sulphate and glutathione derivatives (i.e. cysteine and N-acetyl cysteine) was not significantly changed by disulfiram treatment. Thus it seems unlikely that the previously observed protective effects of disulfiram against acetaminophen-induced hepatotoxicity in animals due to inhibition of metabolism will be seen in man.