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  • Title: Lack of drug-drug interaction between empagliflozin, a sodium glucose cotransporter 2 inhibitor, and warfarin in healthy volunteers.
    Author: Macha S, Rose P, Mattheus M, Pinnetti S, Woerle HJ.
    Journal: Diabetes Obes Metab; 2013 Apr; 15(4):316-23. PubMed ID: 23094794.
    Abstract:
    AIM: To investigate potential drug-drug interactions between empagliflozin and warfarin. METHODS: Healthy subjects (n = 18) received empagliflozin 25 mg qd for 5 days (treatment A), followed by empagliflozin 25 mg qd for 7 days (days 6-12) with a single 25 mg dose of warfarin on day 6 (treatment B), and a single 25 mg dose of warfarin alone (treatment C), in an open-label, crossover study. Subjects received treatments in sequence AB_C or C_AB with a washout period of ≥14 days between AB and C or C and AB. RESULTS: Warfarin had no effect on empagliflozin area under concentration-time curve or maximum plasma concentration at steady-state (AUC(τ,ss) or C(max,ss)): geometric mean ratios (GMRs) (90% confidence intervals [CI]) were 100.89% (96.86, 105.10) and 100.64% (89.79, 112.80), respectively. Empagliflozin had no effect on AUC from 0 h to infinity (AUC(0-∞)) or C(max) for R- or S-warfarin (GMRs [90% CI] for AUC(0-∞): 98.49% [95.29, 101.80] and 95.88% [93.40, 98.43], respectively; C(max): 97.89% [91.12, 105.15] and 98.88% [91.84, 106.47], respectively). Empagliflozin had no clinically relevant effects on warfarin's anticoagulant activity (international normalised ratio [INR]) (GMR [95% CI] for peak INR: 0.87 [0.73, 1.04]; area under the effect-time curve from 0 to 168 h: 0.88 [0.79, 0.98]. No drug-related adverse events were reported for empagliflozin after monotherapy or combined administration. The combination of empagliflozin and warfarin was well tolerated. CONCLUSIONS: No drug-drug interactions were observed between empagliflozin and warfarin, indicating that empagliflozin and warfarin can be co-administered without dosage adjustments of either drug.
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