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  • Title: Lack of pharmacokinetic interaction between zileuton and phenytoin in humans.
    Author: Samara E, Cavanaugh JH, Mukherjee D, Granneman GR.
    Journal: Clin Pharmacokinet; 1995; 29 Suppl 2():84-91. PubMed ID: 8620675.
    Abstract:
    A randomised double-blind crossover study was undertaken in 20 healthy adult male volunteers to assess the effects of multiple oral dose administration of zileuton (600mg every 6 hours for 8 days) on the single dose pharmacokinetics of phenytoin 300mg. Serial blood samples were collected up to 72 hours after phenytoin administration and plasma concentrations were determined by high performance liquid chromatography. Pharmacokinetic data were analysed utilising noncompartmental and Michaelis-Menten-based population pharmacokinetic analysis. Zileuton did not significantly alter the peak plasma concentration, time to peak plasma concentration, and area under the plasma concentration-time curve of phenytoin. Moreover, population analysis revealed no significant effect of zileuton on the Michaelis-Menten parameters of phenytoin. Thus, coadministration of multiple doses of zileuton (2.4 g/day) did not significantly affect the single dose pharmacokinetics of phenytoin.
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