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Digestive Diseases and Sciences

, Volume 62, Issue 3, pp 739–745 | Cite as

Effect of Vonoprazan, a Potassium-Competitive Acid Blocker, on the 13C-Urea Breath Test in Helicobacter pylori-Positive Patients

  • Mayu Takimoto
  • Toshihiko TomitaEmail author
  • Takahisa Yamasaki
  • Shota Fukui
  • Masato Taki
  • Takuya Okugawa
  • Takashi Kondo
  • Tomoaki Kono
  • Katsuyuki Tozawa
  • Eitatsu Arai
  • Yoshio Ohda
  • Tadayuki Oshima
  • Hirokazu Fukui
  • Jiro Watari
  • Hiroto Miwa
Original Article

Abstract

Background and Aim

Vonoprazan (VPZ) is a new oral potassium-competitive acid blocker that has recently become available. The aim of this study was to investigate the effects of VPZ on the urease activity of H. pylori as measured by the 13C-urea breath test (13C-UBT).

Patients and Methods

A total of 60 patients (26 men, 34 women; mean age 53.2 ± 13.6 years) who were diagnosed as H. pylori-positive were recruited. The patients were randomly allocated to three treatment groups: lansoprazole (LPZ) 30 mg (n = 20), VPZ 20 mg (n = 20) once daily for 3 weeks, or the control group (n = 20). The 13C-UBT was carried out at baseline and after 3 weeks of treatment, and the baseline and after treatment results then compared. Δ13C‰ ≥ 2.5‰ was considered H. pylori-positive.

Results

Four patients failed to complete the medication and were omitted from the analysis; data from the LPZ group (n = 18), VPZ group (n = 18), and control group (n = 20) were analyzed. The control group showed no significant change in 13C-UBT data between baseline and the completion of 3-week treatment (baseline: 26.6 ± 23.0‰, completion: 21.1 ± 13.1‰). The 13C-UBT data at week 3 were significantly decreased in both the VPZ group (baseline: 32.8 ± 22.7‰, completion: 7.6 ± 9.2‰, p = 0.0002) and the LPZ group (baseline: 41.8 ± 33.4‰; completion: 9.6 ± 8.8‰, p = 0.0006) compared to baseline.

Conclusions

VPZ treatment reduced the value of UBT, warning that UBT for patients with VPZ treatment should be evaluated carefully.

Keywords

Helicobacter pylori Urea breath test Vonoprazan 

Notes

Compliance with ethical standards

Conflict of interest

None.

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Copyright information

© Springer Science+Business Media New York 2017

Authors and Affiliations

  • Mayu Takimoto
    • 1
  • Toshihiko Tomita
    • 1
    Email author
  • Takahisa Yamasaki
    • 1
  • Shota Fukui
    • 1
  • Masato Taki
    • 1
  • Takuya Okugawa
    • 1
  • Takashi Kondo
    • 1
  • Tomoaki Kono
    • 1
  • Katsuyuki Tozawa
    • 1
  • Eitatsu Arai
    • 2
  • Yoshio Ohda
    • 1
  • Tadayuki Oshima
    • 1
  • Hirokazu Fukui
    • 1
  • Jiro Watari
    • 1
  • Hiroto Miwa
    • 1
  1. 1.Division of Gastroenterology, Department of Internal MedicineHyogo College of MedicineNishinomiyaJapan
  2. 2.Department of Internal MedicineNishinomiya Kyoritsu Neurosurgical HospitalNishinomiyaJapan

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