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Gastroenterology Research and Practice
Volume 2017 (2017), Article ID 2019802, 6 pages
https://doi.org/10.1155/2017/2019802
Clinical Study

First-Line Helicobacter pylori Eradication with Vonoprazan, Clarithromycin, and Metronidazole in Patients Allergic to Penicillin

1Department of Gastroenterology, Yokohama City University Graduate School of Medicine, Yokohama, Japan
2Department of Gastroenterology, Institute for Adult Diseases, Asahi Life Foundation, Tokyo, Japan
3Advanced Medical Research Center, Yokohama City University, Yokohama, Japan

Correspondence should be addressed to Shin Maeda; pj.ca.uc-amahokoy@adeams

Received 28 June 2017; Accepted 11 September 2017; Published 18 October 2017

Academic Editor: Tatsuya Toyokawa

Copyright © 2017 Soichiro Sue et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Aim. To assess the efficacy of 7-day first-line Helicobacter pylori eradication with vonoprazan (VPZ), clarithromycin (CAM), and metronidazole (MNZ) in patients with penicillin allergy. Methods. Patients with penicillin allergy, diagnosed with Helicobacter pylori infection and did not have history of Helicobacter pylori eradication, were eligible for the study. Twenty patients were prospectively treated with 20 mg VPZ twice daily, 200 or 400 mg CAM twice daily, and 250 mg MNZ twice daily for 7 days. We also collected the data from 30 patients retrospectively treated with proton pump inhibitor (PPI), CAM, and MNZ. Safety was evaluated in patients completing an adverse effect questionnaire. Results. Both the intention-to-treat and per-protocol effectiveness of VPZ-based eradication were 100% (95% CI: 86.1–100%; ). The eradication rates of PPI-based regimen were 83.3% (95% CI: 65.3–94.4%) in the ITT and 82.7% (95% CI: 64.2–94.2%) in the PP analyses. Abdominal fullness was more frequent in VCM compared to PCM. However, all patients with VCM regimen had taken 100% of their course of medication. Conclusion. Triple therapy with VPZ, CAM, and MNZ is well tolerated and effective for eradicating Helicobacter pylori in patients allergic to penicillin. This study was registered in the UMIN Clinical Trials Registry as UMIN000016335.