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The impact of current tobacco use on the outcome of paracetamol poisoning

, : The impact of current tobacco use on the outcome of paracetamol poisoning. Alimentary Pharmacology & Therapeutics 18(10): 979-985

Background: Tobacco smoke contains a number of substances that are capable of inducing cytochrome P450. Consequently, current tobacco use may enhance the hepatotoxicity from a paracetamol overdose by increasing the oxidative metabolism of paracetamol. Aim: To evaluate, by multivariate analysis, the effect of current tobacco use on the morbidity and mortality from paracetamol-induced hepatotoxicity. Methods: A retrospective study was carried out on the basis of the hospital charts of 602 patients admitted with single-dose paracetamol poisoning for whom information on current tobacco use was available. Results: In patients admitted with paracetamol poisoning, the rate of current daily tobacco use of 70% (424 of 602 patients) was considerably higher than the rate of 31% in the background population (chi-squared test: P<0.0001). Current tobacco use was an independent risk factor for the development of hepatic encephalopathy (odds ratio, 2.68; 95% confidence interval, 1.28-5.62) and mortality (odds ratio, 3.64; 95% confidence interval, 1.23-10.75). Current tobacco use was independently associated with high peak values of alanine transaminase and the international normalized ratio. Conclusions: Current tobacco use was very frequent in patients admitted with paracetamol poisoning. It was an independent risk factor of severe hepatotoxicity, acute liver failure and death following paracetamol overdose.


PMID: 14616163

DOI: 10.1046/j.1365-2036.2003.01789.x

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