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  • Title: Effect of the oral renin inhibitor aliskiren on the pharmacokinetics and pharmacodynamics of a single dose of warfarin in healthy subjects.
    Author: Dieterle W, Corynen S, Mann J.
    Journal: Br J Clin Pharmacol; 2004 Oct; 58(4):433-6. PubMed ID: 15373937.
    Abstract:
    AIMS: To investigate the effects of aliskiren, an oral renin inhibitor, on the pharmacokinetics and pharmacodynamics of warfarin. METHODS: In a single-blind, placebo-controlled, randomized, two-period crossover study, 15 healthy male and female subjects received a single oral dose of 25 mg racemic warfarin twice, once in the morning of the 8th day of treatment with 150 mg aliskiren and once at the same time point during treatment with placebo. Blood samples were collected for the measurement of prothrombin time (PT) and activated thromboplastin time (aPTT) and for determination of plasma concentrations of (R)- and (S)-warfarin. RESULTS: Aliskiren treatment had no effect on the blood coagulation parameters (PT, INR and aPTT). The ratios of least square means (90% CI) of pharmacokinetic parameters in the presence and absence of aliskiren for (R)- and (S)-warfarin were Cmax 0.89 (0.82, 0.96) and 0.88 (0.80, 0.97), AUC(0, infinity) 1.00 (0.94, 1.07) and 1.06 (0.96, 1.16) and t(1/2) 0.99 (0.92, 1.07) and 1.05 (0.96, 1.14). CONCLUSIONS: Multiple doses of aliskiren had no detectable effect on the pharmacokinetics or pharmacodynamics of a single dose of warfarin in healthy subjects.
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