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  • Title: Effect of grapefruit juice on pharmacokinetics of itraconazole in healthy subjects.
    Author: Kawakami M, Suzuki K, Ishizuka T, Hidaka T, Matsuki Y, Nakamura H.
    Journal: Int J Clin Pharmacol Ther; 1998 Jun; 36(6):306-8. PubMed ID: 9660036.
    Abstract:
    OBJECTIVE: To examine the effect of grapefruit juice on the disposition of oral administered itraconazole in healthy subjects. METHODS: Twenty-two healthy male subjects received a single 100 mg dose of itraconazole with either 350 ml grapefruit juice, orange juice or mineral water. Plasma concentrations of itraconazole were measured by HPLC, and pharmacokinetic parameters; Cmax, Tmax, T1/2, AUC, and AUC corrected by human body surface area: AUC/S, were calculated. RESULTS: Grapefruit juice had no effect on any pharmacokinetic parameter of itraconazole. However, T1/2, AUC, or AUC/S were significantly decreased in orange juice treatment group compared to those in mineral water group (average decrease 56%, p < 0.01, 41%, p < 0.05, and 43%, p < 0.05, respectively). CONCLUSION: Coadministration of grapefruit juice did not affect any pharmacokinetic parameter of itraconazole while that of orange juice decreased the parameters of T1/2, AUC, and AUC/S of the drug.
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