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Background: The success rate of currently recommended 7‐day triple therapy with a PPI plus amoxicillin and clarithromycin has fallen into the unacceptable range. It is urgent to look for a new strategy to treat the infection of Helicobacter pylori. Aims: To observe the efficacy of triple therapy‐based, bismuth‐containing quadruple therapy for H. pylori treatment. Methods: A total of 160 patients with functional dyspepsia who were Hp+ were randomly assigned into two groups. Regimen: Omeprazole 20 mg, Amoxicillin 1.0 g, Clarithromycin 500 mg and Bismuth Potassium Citrate 220 mg, twice a day. Eighty patients received 7‐day quadruple therapy and 80 patients received the same therapy for 14 days. Six weeks after treatment, H. pylori eradication was assessed by 13C‐urea breath test. Minimal inhibitory concentrations of metronidazole, clarithromycin and amoxicillin of clinical isolates were determined by the twofold agar dilution method. Results: Fourteen‐day therapy led to a significant increase of H. pylori eradication success when compared to 7‐day therapy in the intention‐to‐treat analysis (93.7 vs 80.0%; p = .01), and the per‐protocol analysis (97.4 vs 82.0%; p = .0016). The H. pylori resistance rates to metronidazole, clarithromycin and amoxicillin were 42.1, 18.0 and 0%. Fourteen‐day therapy was significantly more effective in patients with clarithromycin‐resistant strains. Incidences of adverse events were comparable. Conclusions: Addition bismuth and prolonging treatment duration can overcome H. pylori resistance to clarithromycin and decrease the bacterial load. Fourteen‐day triple therapy‐based, bismuth‐containing quadruple therapy achieved ITT success rate 93% and could be recommended as the first line eradication regimen.  相似文献   

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