A Single- and Multiple-Dose Study to Evaluate the Pharmacokinetics of Fixed-Dose Grazoprevir/Elbasvir in Healthy Chinese Participants

• Main Authors: Li H, Yang Z, Zhang S, Xu L, Wei Y, Jiang J, Caro L, Feng HP, McCrea JB, Li M, Xie S, Wang J, Zhao XM, Mu S
• Format: Article
• Language: English
• Published: Dove Medical Press 2020-02-01
• Series: Clinical Pharmacology : Advances and Applications
• Subjects: elbasvir; grazoprevir; healthy volunteers; hepatitis c virus; pharmacokinetics
• Online Access: https://www.dovepress.com/a-single--and-multiple-dose-study-to-evaluate-the-pharmacokinetics-of--peer-reviewed-article-CPAA

Haiyan Li,1 Zhenhua Yang,1 Shuang Zhang,1 Lin Xu,1 Yudong Wei,1 Jun Jiang,2 Luzelena Caro,3 Hwa-Ping Feng,3 Jacqueline B McCrea,3 Meng Li,2 Shuang Xie,2 Jiangdian Wang,2 Xu Min Zhao,2 Shengmei Mu2 1Drug Clinical Trial Center, Peking University Third Hospital, Beijing, People’s Republic of China; 2Department of Infectious Diseases, MSD (China) R&D, Beijing, People’s Republic of China; 3Department of Infectious Diseases, Merck & Co., Inc., Kenilworth, NJ, USACorrespondence: Haiyan LiDrug Clinical Trial Center, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing 100191, People’s Republic of ChinaTel [phone]Email [e-mail]: The burden of hepatitis C virus infection is particularly high in Asian countries, and new treatments are urgently needed. The purpose of this study was to characterize the pharmacokinetics (PK) and safety of the fixed-dose combination tablet of elbasvir/grazoprevir in healthy Chinese participants.Patient and Methods: In this Phase I, single-site, open-label, 3-period study in healthy Chinese adults, participants received a single tablet of elbasvir 50 mg/grazoprevir 100 mg, followed by blood sampling for up to 96 hrs (http://www.chinadrugtrials.org.cn/ CTR20160034; Protocol PN071). Participants then received 1 tablet daily for 10 days, followed by a minimum 10-day washout, after which participants received a single dose of 2 tablets (elbasvir 100 mg/grazoprevir 200 mg). Elbasvir and grazoprevir PK were assessed following single and multiple doses. Safety and tolerability were also evaluated.Results: Twelve participants (50% male) were enrolled in and completed the study. Following single-dose oral administration of elbasvir 50 mg/grazoprevir 100 mg or elbasvir 100 mg/grazoprevir 200 mg, the median Tmax was 3– 4 hrs and elimination half-life was 18 hrs (elbasvir) and 30 hrs (grazoprevir). Multiple-dose administration resulted in AUC0– 24 accumulation ratios of 1.58 (elbasvir) and 2.35 (grazoprevir). Both elbasvir 50 mg/grazoprevir 100 mg and 100 mg/200 mg regimens were generally well tolerated.Conclusion: Single-dose administration of elbasvir 50 mg/grazoprevir 100 mg or 100 mg/200 mg and once-daily administration of elbasvir 50 mg/grazoprevir 100 mg for 10 days has been adequately characterized, with PK values within the expected range, and was generally well tolerated in healthy Chinese male and female participants.Keywords: elbasvir, grazoprevir, healthy volunteers, hepatitis C virus, pharmacokinetics