Background And Aims: The efficacy of PPI-amoxicillin dual therapy (high-dose dual therapy) in the eradication of Helicobacter pylori is controversial. We aimed to investigate whether PPI-amoxicillin dual therapy is effective.
Methods: We searched several publication databases for randomized controlled trials (RCTs) that compared PPI-amoxicillin dual therapy with controls up to March 2019. Meta-analyses of eradication rates were performed using random-effects models.
Results: Data from twelve RCTs including 2249 patients suggested that PPI-amoxicillin dual therapy and the current mainstream guidelines-recommended therapies achieved similar efficacy (83.2% vs 85.3%, risk ratio [RR]: 1.00, 95% CI 0.97-1.03, intention-to-treat analysis), (87.5% vs 90.1%, RR: 0.98, 95% CI 0.95-1.02, per-protocol analysis), and compliance (94.3% vs 93.5%, RR: 1.11, 95% CI 0.78-1.59), but side effects were less likely in the dual therapy (12.9% vs 28.0%, RR: 0.53, 95% CI 0.37-0.76). Further subgroup analyses showed that the seven RCTs (1302 patients) that reported antimicrobial susceptibility test results also showed that PPI-amoxicillin dual therapy and the current guidelines-recommended therapies achieved similar efficacy, and PPI-amoxicillin dual therapy was as effective for rescue therapy (RR: 0.97, 95% CI 0.89-1.05) as for first-line treatment (RR: 0.97, 95% CI 0.93-1.02).
Conclusions: Compared with the current mainstream guidelines-recommended therapies, PPI-amoxicillin dual therapy has the same efficacy and compliance, and generally PPI-amoxicillin dual therapy causes fewer side effects.
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