| Not Yet Recruiting | Personalized vs Standard of Care Treatment for Helicobacter Pylori Eradication Among Veterans NCT07104318 | VA Office of Research and Development | Phase 3 |
| Recruiting | 7-Day Vonoprazan, High-Dose Amoxicillin, and Bismuth Therapy NCT07232095 | The First Affiliated Hospital with Nanjing Medical University | Phase 4 |
| Recruiting | Distribution Characteristics of Helicobacter Pylori NCT07253948 | Jilin University | — |
| Recruiting | Prevalence of Helicobacter Pylori Infection and Gastric Cancer in the West Indies NCT04949737 | University Hospital Center of Martinique | — |
| Recruiting | H. Pylori Eradication With Argon Plasma During Endoscopy NCT06529159 | Christopher C. Thompson, MD, MSc | N/A |
| Recruiting | Prospective Gastric Cancer Screening Using Helicobacter Pylori High-Risk Single Nucleotide Polymorphism Detect NCT06943781 | Fudan University | — |
| Recruiting | Study of the Esophageal String Test (EST) for the Diagnosis of Helicobacter Pylori NCT06871579 | National Institute of Allergy and Infectious Diseases (NIAID) | N/A |
| Not Yet Recruiting | Keverprazan Combined with Amoxicillin for the Treatment of Helicobacter Pylori NCT06851468 | Key Laboratory for Gastrointestinal Diseases of Gansu Province | N/A |
| Enrolling By Invitation | Differences in Gastric Microbiota in Patients Who Were Infected Between CagA Positive and Negative Helicobacte NCT06785922 | Mahidol University | N/A |
| Recruiting | Efficacy and Safety of Keverprazan-amoxicillin Dual Therapy for Helicobacter Pylori First-line Treatment NCT07122024 | Second Affiliated Hospital, School of Medicine, Zhejiang University | Phase 4 |
| Completed | Helicobacter Pylori and Vonoprazan Dual Therapy NCT05649709 | The First Affiliated Hospital of Nanchang University | Phase 4 |
| Completed | Association of Oral Helicobacter Pylori Infection With Gastric Helicobacter Pylori Infection NCT05790512 | Xijing Hospital of Digestive Diseases | — |
| Completed | Effect of Oral Helicobacter Pylori Infection on the Efficacy of Gastroluminal Helicobacter Pylori Eradication NCT05790525 | Xijing Hospital of Digestive Diseases | Phase 4 |
| Recruiting | PyloPlus Urea Breath Test System Pediatric Safety and Efficacy Study NCT05276557 | ARJ Medical, Inc. | Phase 3 |
| Completed | A Study Reviewing Medical Records of Adults With Helicobacter Pylori Infections in China NCT05073367 | Takeda | — |
| Completed | 14-day Susceptibility-guided Bismuth Quadruple Therapy for Multiple Drug Resistant H. Pylori Infection NCT06687499 | National Cheng-Kung University Hospital | Phase 4 |
| Unknown | Helicobacter Pylori Eradication Therapy in Portugal NCT05449028 | Unidade Local de Saúde de Coimbra, EPE | N/A |
| Unknown | Vonoprazan Hp Dual or Triple Eradication Regimes NCT05345210 | Xijing Hospital of Digestive Diseases | Phase 4 |
| Completed | Susceptibility-guided Bismuth Quadruple Therapy for Multiple-resistant Helicobacter Pylori Strains NCT06687473 | National Cheng-Kung University Hospital | Phase 4 |
| Unknown | Vonoprazan-Based Triple Therapy in Comparison With Extended Sequential Therapy NCT05371249 | Fu Jen Catholic University Hospital | Phase 4 |
| Unknown | Nitazoxanide and Lansoprazole Based Regimens for H. Pylori Management NCT05184491 | National Liver Institute, Egypt | Phase 4 |
| Unknown | Family-based Screening and Treatment of Helicobacter Pylori：A Real World Study NCT04956679 | Shandong University | — |
| Unknown | Development of a Laboratory Test for the Detection of a Fluorescent-labeled Urease Inhibitor Marker Attached t NCT04937426 | Hillel Yaffe Medical Center | N/A |
| Completed | A Study of Vonoprazan in Adults With Helicobacter Pylori NCT04753437 | Takeda | Phase 1 |
| Completed | The Study on the Selection of Time for Retreatment of Helicobacter Pylori After Eradication Failure NCT04810793 | Shandong University | — |
| Recruiting | Helicobacter Pylori, Atrophic Gastritis and Intestinal Metaplasia Registry and Prospective Study NCT05053945 | Chinese University of Hong Kong | — |
| Completed | A Study to Evaluate the Efficacy and Safety of Bismuth-Containing Quadruple Therapy With Oral Vonoprazan (TAK- NCT04198363 | Takeda | Phase 3 |
| Unknown | A Comparison of High-dose Dual Therapy and Half-dose Clarithromycin-containing Bismuth Quadruple Therapy for H NCT04101708 | Shandong University | Phase 4 |
| Completed | Optimized-dose Amoxicillin Versus Standard-dose Amoxicillin for Quadruple Therapy in Helicobacter Pylori Eradi NCT05635942 | Les Laboratoires des Médicaments Stériles | Phase 4 |
| Unknown | The Associations Between the Gastric Mucosal Pathology and the Eradication Rate of H.Pylori :A Multicenter Stu NCT04030715 | Shandong University | N/A |
| Unknown | The Situation of Re-infection of Helicobacter Pylori After Successful Eradication NCT04029493 | Shandong University | — |
| Unknown | The Study of the Antimicrobial Resistance of Helicobacter Pylori in Shandong Province NCT04029415 | Shandong University | — |
| Completed | A Comparison of Clarithromycin-based and Furazolidone-based Bismuth-containing Regimens for H. Pylori Eradicat NCT03716622 | Shandong University | Phase 4 |
| Unknown | H. Pylori Eradication for Moderate ITP NCT03177629 | Seoul National University Hospital | Phase 3 |
| Not Yet Recruiting | The Influence of Helicobacter Pylori Eradication on Gastric Pathology: a Long-term, Prospective Cohort Study NCT02933229 | Shandong University | Phase 4 |
| Unknown | Optimal Duration of Antimicrobial Susceptibility Test (AST) Guided Rescue Therapy for Helicobacter Pylori Infe NCT02934048 | Shandong University | Phase 4 |
| Completed | TAK-438 Bismuth Drug Interaction Study NCT02892409 | Takeda | Phase 1 |
| Unknown | Difference of Gastric Microbiota in the Process of Correa's Model. NCT02833363 | Shandong University | — |
| Completed | Performances of a H. Pylori Stool PCR Test NCT03566004 | Poitiers University Hospital | N/A |
| Unknown | Value of Additional Corpus Biopsy for Diagnosis of H Pylori in Atrophic Gastritis. Prospective Non-randomized NCT02675010 | Mansoura University | N/A |
| Completed | Efficiency Study of Clarithromycin and Bismuth-containing Quadruple Therapy to Treat H.Pylori NCT01667575 | Shanghai Jiao Tong University School of Medicine | Phase 4 |
| Unknown | The Effect of PPI Therapy on the Result of Helicobacter Pylori Diagnostic Tests NCT01278901 | Rabin Medical Center | — |
| Completed | Study Comparing Sequential and Concomitant Therapy for Helicobacter Pylori Eradication in Routine Clinical Pra NCT01273441 | Fundación de Investigación Biomédica - Hospital Universitario de La Princesa | Phase 4 |
| Completed | The Preventive Effect of Helicobacter Pylori Eradication on the Development of Gastric Cancer NCT00596401 | Showa Inan General Hospital | — |
| Completed | Helicobacter in The Gambia (Part 1) NCT00466700 | Medical Research Council Unit, The Gambia | — |
| Withdrawn | Helicobacter in The Gambia (Part 2) NCT00467155 | Medical Research Council Unit, The Gambia | — |
| Unknown | Feasibility Study of Phototherapy System to Treat H Pylori NCT00306280 | LumeRx | N/A |
| Unknown | The Influence of FP-10 on the Eradication Rates of H. Pylori by a Triple Therapy NCT00281047 | Hamamatsu University | Phase 2 / Phase 3 |
| Completed | Helicobacter Pylori Eradication After Endoscopic Resection of Gastric Tumors NCT01510730 | Seoul National University Hospital | Phase 3 |
| Completed | Safety and Immunogenicity of Chiron's Investigational H. Pylori Vaccine in Healthy Adults NCT00613665 | Novartis Vaccines | Phase 1 |
| Withdrawn | Helicobacter Pylori and Iron Deficiency: Prevalence of Association and Effect of Therapy NCT00475527 | Hadassah Medical Organization | Phase 4 |