Abstract
Background: Vonoprazan-based triple therapy has recently been reported as being more effective than proton pump inhibitors for the eradication of Helicobacter pylori (H. pylori), but it is apparent that the eradication rate could be further improved. Methods: We investigated the effect of the concomitant use of polaprezinc, a therapeutic agent for gastric ulcers, and vonoprazan-based seven-day triple therapy in patients with gastric ulcers compared to standard vonoprazan-based seven-day triple therapy in patients with atrophic gastritis. The regimen for the treatment of atrophic gastritis contained vonoprazan 20 mg, amoxicillin 750 mg, and clarithromycin 200 mg b.d. (VAC group) for seven days; and that for gastric ulcers contained VAC and polaprezinc 75 mg b.d. (VACP group) for seven days. Results: Between October 2021 and January 2023, 201 subjects were examined (VAC group, n = 165; VACP group, n = 36). In per-protocol (PP) analysis, the eradication rate was significantly higher in the VACP group (100%) than in the VAC group (88.2%) (p = 0.025). In patients with severe atrophic gastritis, eradication rates were significantly higher in the VACP group (100%) than in the VAC group (84.4%) in PP analysis. (p = 0.024). Conclusions: The concomitant use of polaprezinc and standard vonoprazan-based first-line eradication therapy is effective for H. pylori.
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