Abstract:Objective To explore whether probiotics auxiliary bismuth quadruple therapy can effectively improve the eradication rate of H.pylori, and whether can shorten the medication time for H.pylori and reduce the related adverse reactions during the use of antibacterial drugs. Methods Six hundred H. pylori-infected patients were selected and randomly divided into four groups. Group A: the total course of treatment is 10 days, with amoxicillin capsule 1.0 g bid, clarithromycin sustained release tablets 500mg bid, rabeprazole sodium enteric-coated tablets 20 mg bid, olloidal pectin bismuth capsule 200 mg bid; group B: the total course of treatment is 14 days and the medication plan is the same as group A; group C: the total course of treatment is 10 days, and the compound Lactobacillus acidophilus tablets 1.0 g tid was added to the group A regimen; group D: The total course of treatment is 14 days, and the medication plan is the same as group C. After 4 to 8 weeks of treatment, 13C-UBT was performed, and the negative ones were judged to be successful in the radical treatment of H.pylori. Finally, the eradication rate of H.pylori and the incidence of adverse reactions among the four groups were compared. Results According to the intent-to-treat analysis (ITT analysis), the comparisons of eradication rate between group A and group B, group A and group C, group A and group D, group C and group D were statistically significant (P < 0.007), the differences between group B and group C, group B and group D were not statistically significant (P > 0.007). According to the perprotocol analysis (PP analysis) method, the differences of eradication rate between group A and group B, group A and group C, group A and group D, group C and group D were statistically significant (P < 0.007), but no significant difference was found between group B and group C, group D (P > 0.007). The incidences of abdominal distension, nausea, and diarrhea in group A were significantly higher than those in group C, and the differences were statistically significant (P < 0.007). Compared with group D, group B had a higher incidence of abdominal distension, anorexia, and diarrhea, and the difference was statistically significant (all P < 0.007). The incidences of bloating, nausea, diarrhea, and constipation were significantly higher in Group B than in group C, and the differences were statistically significant (P < 0.007). The difference was not statistically significant in the incidences of rash, headache, and taste abnormalities among the groups (P > 0.05). Conclusion Probiotics auxiliary bismuth quadruple therapy can effectively improve the eradication rate of H.pylori up to a point. For some areas with low resistance to antibiotics, it is also possible to effectively shorten the time of administration, and probiotics can also reduce the gastrointestinal side effects that occur during the use of antibacterials.