Phase III, randomised, double-blind, multicentre study to evaluate the efficacy and safety of vonoprazan compared with lansoprazole in Asian patients with erosive oesophagitis

Yinglian Xiao, Shutian Zhang, Ning Dai, Guijun Fei, Khean-Lee Goh, Hoon Jai Chun, Bor-Shyang Sheu, Chui Fung Chong, Nobuo Funao, Wen Zhou, Minhu Chen, Yinglian Xiao, Shutian Zhang, Ning Dai, Guijun Fei, Khean-Lee Goh, Hoon Jai Chun, Bor-Shyang Sheu, Chui Fung Chong, Nobuo Funao, Wen Zhou, Minhu Chen

Abstract

Objective: To establish the non-inferior efficacy of vonoprazan versus lansoprazole in the treatment of Asian patients with erosive oesophagitis (EO).

Design: In this phase III, double-blind, multicentre study, patients with endoscopically confirmed EO were randomised 1:1 to receive vonoprazan 20 mg or lansoprazole 30 mg, once daily for up to 8 weeks. The primary endpoint was EO healing rate at 8 weeks. The secondary endpoints were EO healing rates at 2 and 4 weeks. Safety endpoints included treatment-emergent adverse events (TEAEs).

Results: In the vonoprazan (n=238) and lansoprazole (n=230) arms, 8-week EO healing rates were 92.4% and 91.3%, respectively (difference 1.1% (95% CI -3.822% to 6.087%)). The respective 2-week EO healing rates were 75.0% and 67.8% (difference 7.2% (95% CI -1.054% to 15.371%)), and the respective 4-week EO healing rates were 85.3% and 83.5% (difference 1.8% (95% CI -4.763% to 8.395%)). In patients with baseline Los Angeles classification grade C/D, 2-week, 4-week and 8-week EO healing rates were higher with vonoprazan versus lansoprazole (2 weeks: 62.2% vs 51.5%, difference 10.6% (95% CI -5.708% to 27.002%); 4 weeks: 73.3% vs 67.2%, difference 6.2% (95% CI -8.884 to 21.223); and 8 weeks: 84.0% vs 80.6%, difference 3.4% (95% CI -9.187% to 15.993%)). Overall, EO healing rates appeared higher with vonoprazan versus lansoprazole. TEAE rates were 38.1% and 36.6% in the vonoprazan and lansoprazole group, respectively.

Conclusion: Our findings demonstrate the non-inferior efficacy of vonoprazan versus lansoprazole in terms of EO healing rate at 8 weeks in this population. Safety outcomes were similar in the two treatment arms.

Trial registration number: NCT02388724.

Keywords: erosive oesophagitis; gastric acid; gastro-oesophageal reflux disease; proton pump inhibition.

Conflict of interest statement

Competing interests: MC received speaker honorarium from Xian Janssen, AstraZeneca China, Ipsen Tianjin, Takeda China and CMS China. CFC is an employee of Takeda Development Center Asia, and stock shareholder in Air Liquide and Abbott Laboratories. NF is an employee of Takeda Pharmaceutical Company, and WZ is a former employee of Takeda Pharmaceutical Company. K-L G received fees for participating in an advisory committee or review panel and speaking and chairing for Takeda Pharmaceutical Company. All other authors declare no competing interests.

© Author(s) (or their employer(s)) 2020. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

Figures

Figure 1
Figure 1
Patient disposition. AE, adverse event; PTE, pretreatment event.
Figure 2
Figure 2
Rate of endoscopic healing of EO during the 2-week, 4-week and 8-week treatment period for the full analysis set (A) and patients with LA classification grade C/D (B). *Treatment difference between arms (95% CI). EO, erosive oesophagitis; LA, Los Angeles.

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