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European Journal of Clinical Pharmacology

, Volume 70, Issue 11, pp 1339–1351 | Cite as

Edoxaban population pharmacokinetics and exposure–response analysis in patients with non-valvular atrial fibrillation

  • Ophelia Q. P. YinEmail author
  • Kimura Tetsuya
  • Raymond Miller
Pharmacokinetics and Disposition

Abstract

Purpose

The aim of this study was to evaluate the population pharmacokinetics (PK) and exposure–response relationship of edoxaban in patients with non-valvular atrial fibrillation (AF).

Methods

Concentration data from 1,134 subjects in 11 clinical studies (eight phase I, one phase II, and two phase III) were used to perform a population PK analysis, including estimation of the bioavailability and quantification of the effects of P-glycoprotein (P-gp) inhibitors as well as renal impairment on edoxaban PK. The potential relationship between edoxaban PK exposure and incidence of bleeding events was explored based on data from 893 AF patients.

Results

Absolute bioavailability of edoxaban was estimated as 58.3 %. With oral dosing of edoxaban, co-administration of various P-gp inhibitors significantly increased edoxaban bioavailability and decreased volume of distribution (V 2), resulting in a predicted increase of 33–77 % in area under the curve (AUC) and 65–104 % in C max. A much smaller increase was seen in edoxaban concentration at 24 h post-dose (C 24, −24 to 38 %), due to decreased V 2 and shortened elimination half-life. With IV dosing of edoxaban, co-administration of the P-gp inhibitor quinidine decreased both edoxaban clearance (CL) and V 2, resulting in an increase of 32 % in AUC and 66 % in C 24. Creatinine clearance was a significant covariate on renal clearance, whereas age and body weight significantly affected nonrenal clearance. Model-predicted steady state C min was slightly higher, but AUC was comparable for patients who had severe renal impairment and received edoxaban 15 mg once daily (QD) versus patients who had normal renal function or mild renal impairment and received edoxaban 30 mg QD. Exposure–response analysis suggested that edoxaban C min and country/region are significantly associated with the incidence of bleeds.

Conclusions

The model provided reasonable estimation with regard to the absolute bioavailability of edoxaban, the magnitude of change in edoxaban exposure upon co-administration of P-gp inhibitors, and the impact of renal impairment on edoxaban clearance. Analysis results supported a 50 % dose reduction scheme for subjects with severe renal impairment. Further confirmation will be sought by incorporating clinical safety and efficacy information from larger phase III trials.

Keywords

Edoxaban Population pharmacokinetics Exposure–response 

Notes

Acknowledgments

The authors thank the research staff members who participated in the clinical studies. The authors also thank Dr. Saeheum Song for preparing the analysis dataset and AlphaBioCom for editorial assistance. The analysis was sponsored by Daiichi Sankyo.

Conflict of interest

Ophelia Q. P. Yin, Kimura Tetsuya, and Raymond Miller are employees of Daiichi Sankyo.

Supplementary material

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Ophelia Q. P. Yin
    • 1
    Email author
  • Kimura Tetsuya
    • 2
  • Raymond Miller
    • 1
  1. 1.Modeling and Simulation Translational Medicine and Clinical PharmacologyDaiichi Sankyo Pharma DevelopmentEdisonUSA
  2. 2.Daiichi Sankyo Co., Ltd.TokyoJapan

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