H. pylori Eradication Therapy and Diarrhea Risk

Incidence and Mechanism of Diarrhea

The incidence of diarrhea during H. pylori eradication therapy can be as high as 41% during the first week of treatment, affecting approximately 21-41% of patients, according to studies published in Gut Microbes 1
Antibiotic-associated diarrhea occurs due to disruption of the normal gut microbiota by the antibiotics used in H. pylori eradication regimens, as reported in Gut Microbes 2, 1

Standard triple therapy is associated with significant rates of adverse events, including diarrhea, as noted in Gastroenterology 3, 4
Bismuth quadruple therapy and non-bismuth quadruple therapy can also cause diarrhea, according to Gut and Gastroenterology 3, 5

Meta-analyses show that the incidence of total adverse effects in standard H. pylori therapy ranges from 24% to 36.27% in control groups not receiving probiotics, as published in Gut Microbes 1, 6

Multiple meta-analyses demonstrate that probiotic supplementation significantly reduces the risk of diarrhea during H. pylori eradication therapy, with a pooled odds ratio of 0.21, as reported in Gut Microbes 2, 1, 6
Certain multi-strain probiotics have shown significant efficacy in preventing antibiotic-associated diarrhea during H. pylori treatment, according to Gut Microbes 2, 1
Lactobacillus-containing probiotics and Bifidobacterium longum have demonstrated particular effectiveness in reducing treatment-related side effects, as noted in Gut Microbes 6

The Maastricht IV/Florence Consensus Report acknowledges that certain probiotics show promising results as adjuvant treatment in reducing side effects of H. pylori therapy, as published in Gut 5
Adjunctive use of probiotics should be considered to reduce the risk of diarrhea and improve patient compliance, according to Gut Microbes 2, 1
When selecting an H. pylori treatment regimen, clinicians should consider the potential for diarrhea and other adverse effects, especially in patients with pre-existing gastrointestinal conditions, as noted in Gastroenterology 3