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- W2074711220 abstract "The pharmacokinetics of pentobarbital, 30 mg/kg iv, were studied in untreated rats and rats pretreated with 1, 5, and 25 ppm of polychlorinated biphenyls in food for up to 140 days. Environmental contaminants may contribute to variations in metabolic rates of drugs by causing enzyme induction. The objective of this work was to quantitate the effects of environmental levels of the contaminant and enzyme inducer, a polychlorinated biphenyl, on the pharmacokinetics of pentobarbital, a drug whose primary elimination route is liver metabolism. The pharmacokinetics of pentobarbital in rats could be fit to a biexponential equation of the type Cp=Ae=αt+Be=βt. After 35 days of pretreatment, only the 25-ppm-treated rats showed any significant acceleration of pentobarbital elimination. At the 70- and 140-day samplings, both the 5- and 25-ppm pretreatments showed significant acceleration of pentobarbital elimination. There were no significant effects on A, α, B, and Vd for any pretreatment. The β-values for the 25-ppm-pretreated rats reached a constant value from the 35-day pretreatment period onward. A calculation of total body clearance suggested that pentobarbital elimination in those rats had approached portal blood flow rate-limited metabolism." @default.
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- W2074711220 date "1977-02-01" @default.
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- W2074711220 title "Effects of Long-Term Exposure to Environmental Levels of Polychlorinated Biphenyls on Pharmacokinetics of Pentobarbital in Rats" @default.
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- W2074711220 doi "https://doi.org/10.1002/jps.2600660227" @default.
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