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  • Title: A Comparative Study of a New Class of Gastric Acid Suppressant Agent Named Vonoparazan versus Esomeprazole for the Eradication of Helicobacter pylori.
    Author: Tsujimae M, Yamashita H, Hashimura H, Kano C, Shimoyama K, Kanamori A, Matsumoto K, Koizumi A, Momose K, Eguchi T, Fukuchi T, Fujita M, Okada A.
    Journal: Digestion; 2016; 94(4):240-246. PubMed ID: 28030862.
    Abstract:
    BACKGROUND: Helicobacter pylori eradication rates have decreased worldwide. Gastric acid inhibition during treatment is important to eradicate these bacteria successfully. A new potassium-competitive acid blocker, vonoprazan (VPZ), has been shown to achieve high eradication rates in a previous randomized controlled trial. OBJECTIVE: To determine the efficacy of VPZ for H. pylori eradication. METHODS: A total of 874 patients were enrolled; 431 received esomeprazole (EPZ) and 443 received VPZ. First-line regimens contained clarithromycin (CAM) 200 mg b.i.d., amoxicillin 750 mg b.i.d., and either EPZ 20 mg b.i.d. or VPZ 20 mg b.i.d. for 7 days. Metronidazole 250 mg b.i.d. replaced CAM in the second-line regimens. The eradication of H. pylori was assessed by 13C-urea breath tests 4-8 weeks after each therapy. RESULTS: The overall first-line eradication rate was 79.9% (341/427) with EPZ vs. 86.3% (377/439) with VPZ (p = 0.019). The second-line eradication rate was 83.3% (45/51) with EPZ vs. 91.1% (41/45) with VPZ (p = 0.900). CONCLUSION: VPZ was significantly more effective than EPZ for first-line treatment. However, for second-line treatment, there was no significant difference between EPZ and VPZ.
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