Clinical trial Recruiting at 1 site Phase 4 Interventional Ages 18 to 75

Adding Saccharomyces boulardii to bismuth quadruple therapy for H. pylori rescue

Official title: Efficacy and Safety of Saccharomyces Boulardii Combined With Bismuth Quadruple Therapy for Helicobacter Pylori Rescue Treatment: A Prospective, Multicenter, Randomized Controlled Trial

Run by Xijing Hospital of Digestive Diseases · NCT07139366 · Data updated 2026-11-12

This tests whether adding the probiotic Saccharomyces boulardii to bismuth-containing quadruple therapy helps adults whose H. pylori infection did not clear after prior treatments.

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Quick facts

PhasePhase 4
Study typeInterventional
Ages18 Years to 75 Years
SexAll
Enrollment1248 (estimated)
SponsorXijing Hospital of Digestive Diseases
Academic / other
Locations1 site (Xi'an, Shaanxi)
StatusRecruiting
StartedOctober 28, 2025
Main results expectedSeptember 2026
Study endsSeptember 2026
Registry record updatedDecember 2, 2025
Trial IDNCT07139366 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adults 18–75 with documented failure of prior H. pylori eradication, who are not pregnant or breastfeeding and who have not previously used tetracycline and furazolidone for H. pylori eradication, are ideal candidates.

Probably not a fit

Patients with prior use of tetracycline or furazolidone for H. pylori, substantial organ impairment, recent use of PPIs/antibiotics/bismuth, pregnancy or lactation, prior upper GI surgery, or other listed exclusions are unlikely to benefit or be eligible.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

Adults aged 18–75 with confirmed failure of prior H. pylori eradication are randomized to receive either bismuth-containing quadruple therapy alone or the same regimen plus Saccharomyces boulardii for 14 days. The regimen includes bismuth, esomeprazole, tetracycline and furazolidone, with the probiotic given as oral powder in the experimental arm. Patients are screened, receive a randomization visit on Day 0, an end-of-treatment visit around Day 14–16, and a follow-up visit about 28 days after treatment completion. Eradication is confirmed at follow-up by urea breath test, rapid urease test, or H. pylori stool antigen test.

Why it matters

Potential benefit: If successful, adding Saccharomyces boulardii could increase H. pylori eradication rates and reduce recurrence or treatment-related symptoms for patients who failed earlier therapies.

How similar studies have gone: Previous trials of Saccharomyces boulardii as an adjunct to H. pylori regimens have shown modest improvements in eradication rates and symptom reduction, but results are mixed and this exact combination has limited prior evidence.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Age between 18\~75, both gender.
* Patients who had failed H.pylori eradication therapies .
* Women are eligible if they are not pregnant or nursing, and if they are of childbearing potential they are required to use medically acceptable contraception for the duration of the study and 30 days thereafter.

Exclusion Criteria:

* Patients who have previously used tetracycline and furazolidone antibiotics to eradicate infection with H. pylori.
* Contraindications to study drugs.
* Substantial organ impairment, severe or unstable cardiopulmonary or endocrine disease.
* Constant use of anti-ulcer drugs ( including taking proton-pump.inhibitors(PPI) within 2 weeks before the \[13C\] urea breath test), antibiotics or bismuth complexes (more than 3 times /1 month before screening).
* Pregnant or lactating women.
* Underwent upper gastrointestinal Surgery.
* Dysphagia.
* Evidence of bleeding or iron efficiency anemia.
* A history of malignancy.
* Drug or alcohol abuse history in the past 1 year.
* Systemic use of corticosteroids, non steroidal anti-inflammatory drugs, anticoagulants, platelet aggregation inhibitors (except the use of aspirin for less than 100 mg/d).
* Mental disorder.
* Enrolled in other clinical trials in the past 3 months.
* Refuse to sign informed consent.

Where it's running

  • Xijing Hosipital of Digestive Disease
    Xi'an, Shaanxi, China
    Recruiting

Study contacts

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How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.