Comparing a new medication to standard treatment for preventing stomach issues in heart patients on blood thinners
Official title: A Multi-centre, Randomized, Double-Blind, Double-Dummy, Parallel-Group, Phase 4 Efficacy and Safety Study of P-CAB (Tegoprazan 50 mg Once Daily) Compared With PPI (Rabeprazole 20 mg Once Daily) to Reduce Upper Gastrointestinal Events Including Bleeding and Symptomatic Ulcer Disease
Run by Asan Medical Center · NCT04416581 · Data updated 2026-11-12
This study is testing a new medication called tegoprazan to see if it can prevent stomach problems just as well as the standard treatment for heart patients who are taking blood thinners.
Quick facts
| Phase | Phase 4 |
|---|---|
| Study type | Interventional |
| Ages | 19 Years and up |
| Sex | All |
| Enrollment | 3320 (estimated) |
| Sponsor | Asan Medical Center Academic / other |
| Locations | 45 sites (Anyang and 44 other locations) |
| Status | Recruiting |
| Started | May 12, 2021 |
| Main results expected | December 31, 2027 |
| Study ends | February 28, 2028 |
| Registry record updated | August 28, 2026 |
| Trial ID | NCT04416581 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates include adults aged 19 and older with known cardiac and vascular diseases who are receiving chronic antithrombotic medications.
✕Probably not a fit
Patients who do not have cardiac or vascular diseases or are not on antithrombotic therapy may not benefit from this study.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This clinical trial aims to evaluate the efficacy and safety of a novel potassium-competitive acid blocker (P-CAB) called tegoprazan compared to a standard proton pump inhibitor (PPI) in patients with known cardiac and vascular diseases who are at high risk for gastrointestinal bleeding due to chronic antithrombotic therapy. The study will first conduct a safety surveillance phase with 300 patients to monitor adverse events associated with tegoprazan before proceeding to a randomized, double-blind trial involving 3,100 patients. The primary goal is to determine if tegoprazan is non-inferior to the standard PPI in preventing gastrointestinal events over a 12-month period.
Why it matters
Potential benefit: If successful, this study could provide a safer alternative for gastrointestinal protection in patients at high risk of bleeding while on antithrombotic therapy.
How similar studies have gone: Other studies have shown promising results with similar approaches, but this specific comparison of P-CAB versus PPI in this patient population is relatively novel.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria:
1. Patients 19 years of age or older with known cardiac and vascular disease who are receiving chronic use of antithrombotic drugs (either antiplatelets, oral anticoagulant (OAC), and its combinations). Specific clinical conditions that may confer a need for long-term antithrombotic therapy may include documented coronary artery disease (stable or unstable angina, acute coronary syndrome, a history of myocardial infarction, or any coronary revascularization), documented cerebrovascular disease (stroke or transient ischemic attack), known peripheral arterial disease or a history of peripheral arterial revascularization, atrial fibrillation, or valvular heart disease requiring interventions (transcatheter aortic valve replacement or transcatheter mitral-valve repair). Concomitant use of a proton pump inhibitor is strongly recommended in patients receiving aspirin monotherapy, DAPT (dual antiplatelet therapy; aspirin plus any P2Y12 inhibitors), DAT (dual antithrombotic therapy; antiplatelet drug plus OAC), TAT (triple antithrombotic therapy; DAPT plus OAC), or OAC monotherapy (warfarin or direct oral anticoagulants) who are at high risk of GI bleeding in order to reduce the risk of gastric bleed or GI events. Based on clinical guidelines, the use of P2Y12 inhibitor monotherapy (i.e. clopidogrel, ticagrelor, or prasugrel) is not considered in trial enrollment.
2. On the basis of clinical guidelines and expert consensus documents, we defined a study population with an increased risk of gastrointestinal bleeding if they had a least 1 or more criteria of the following characteristics. Eligible patients for randomization must meet at least 1 characteristic of these criteria:
\*Definition of patients who are at high risk of gastrointestinal bleeding
1. Age ≥65 years
2. Concomitant use of OAC and any antiplatelet therapy (mono or DAPT) (i.e., DAT or TAT)
3. Long-term use of oral NSAIDs (non-steroidal anti-inflammatory drugs) or steroids or high-dose NSAID therapy even during a relatively short-term period.
4. History of prior GI bleeding events at any time
5. History of a previously complicated ulcer
6. History of peptic ulcer disease or a previously uncomplicated ulcer
7. Documented Helicobacter pylori infection
3. Patients who voluntarily participated in the written agreement
Exclusion Criteria:
1. Active bleeding at the time of inclusion or a history of hereditary or acquired hemostatic disorder
2. Any clinical contraindication to using of antithrombotic therapies (antiplatelet agents or OAC)
3. Concurrent use of PPI or P-CAB within 4 weeks before randomization
4. Hemodynamically unstable conditions at the time of inclusion: cardiogenic shock at the time of randomization, refractory ventricular arrhythmias, or congestive heart failure (New York Heart Association class IV).
5. Baseline severe anemia (Hgb \<8 g/dl at baseline) or transfusion within 4 weeks before randomization
6. Baseline severe thrombocytopenia (platelet count \<50,000/mm3)
7. Renal failure dependent on dialysis or severe renal insufficiency (creatinine clearance \<15 ml/min)
8. Severe chronic liver disease (defined as variceal haemorrhage, ascites, hepatic encephalopathy, or jaundice)
9. Hypersensitivity or contraindication to PPI, P-CAB, any of the product components, or substituted benzimidazoles
10. Use of clarithromycin and hypersensitivity to macrolide antibiotics for Helicobacter pylori eradication
11. Concomitant use of clarithromycin with terfenadine, cisapride, astemizole, or pimozide for Helicobacter pylori eradication
12. Systemic treatment with strong CYP 3A4 and p-glycoprotein (P-GP) inhibitors (e.g., systemic azole antimycotics, such as ketoconazole, and human immunodeficiency virus \[HIV\]-protease inhibitors, such as ritonavir)
13. Patients who take atazanavir, nelfinavir, or rilpivirine-containing products (see Drug-Drug interaction section)
14. Clinically significant laboratory abnormality at screening (estimated glomerular filtration rate (eGFR) \<15 mL/min or elevated liver enzyme \[AST, ALT, ALP, total bilirubin\] \> 3 times upper normal limit \[UNL\] or any other condition that, in the opinion of the Investigator, precludes participation in the study
15. Any known or suspected malignancy
16. Patients with non-cardiac co-morbidities with a life expectancy of less than 12 months
17. Patients with active treatment for H-pylori infection
18. Women who are pregnant or breastfeeding or female subjects, premenopausal who are not surgically sterile, or, if sexually active not practicing an effective method of birth control (e.g., prescription oral contraceptives, contraceptive injections, intrauterine device, double-barrier method, contraceptive patch, male partner sterilization) before entry and throughout the study; and, for those of childbearing potential, who have a positive pregnancy test at screening
19. Participation in another clinical study within 12 months. However, where at least one or more conditions are satisfied, it could be an exception according to an investigator's discretion;
1. Participated in the observational study expected no effect on the safety and/or effectiveness evaluation of this trial
2. Screening failed before any interventional factor is involved
3. Participated in academic trials like strategic or medical device comparison studies conducted under standard therapy provided that there is no additional risk or a specific procedure to a subject and no interference between this trial and other studies
Where it's running
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Hallym University Sacred Heart Hospital
Anyang, South Korea Recruiting -
Bucheon Sejong Hospital
Bucheon-si, South Korea Recruiting -
Kosin University Gospel Hospital
Busan, South Korea Recruiting -
Chungbuk National University Hospital
Cheonju, South Korea Recruiting -
Keimyung University Dongsan Medical Center
Daegu, South Korea Recruiting -
Chungnam National University Hospital
Daejeon, South Korea Recruiting
Show 39 more locations
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Gangneung Asan Hospital
Gangneung, South Korea Recruiting -
Hanyang University Guri Hospital
Guri-si, South Korea Recruiting -
Chonnam National University Hospital
Gwangju, South Korea Recruiting -
Hallym University Dongtan Sacred Heart Hospital
Hwaseong-si, South Korea Recruiting -
Inje University Ilsan Paik Hospital
Ilsan, South Korea Recruiting -
Dong-A Medical Center
Pusan, South Korea Recruiting -
Inje University Pusan Paik Hospital
Pusan, South Korea Recruiting -
Pusan National University Hospital
Pusan, South Korea Recruiting -
Chungnam National University Sejong Hospital
Sejong, South Korea Recruiting -
Bundang CHA Hospital
Seongnam, South Korea Recruiting -
Seoul university Bundang hospital
Seongnam-si, South Korea Recruiting -
Asan Medical Center
Seoul, South Korea Recruiting -
Chung-Ang University Hospital
Seoul, South Korea Recruiting -
Hallym University Kangnam Sacred Heart Hospital
Seoul, South Korea Recruiting -
Hanyang University Seoul Hospital
Seoul, South Korea Recruiting -
Kangbuk Samsung Hospital
Seoul, South Korea Recruiting -
Korea University Anam Hospital
Seoul, South Korea Recruiting -
Korea University Guro Hospital
Seoul, South Korea Recruiting -
Kyung Hee University Hospital at Gangdong
Seoul, South Korea Recruiting -
Kyung Hee University Medical Center
Seoul, South Korea Recruiting -
Seoul National University Hospital
Seoul, South Korea Recruiting -
Severance Hospital
Seoul, South Korea Recruiting -
SNU Boramae Medical Center
Seoul, South Korea Recruiting -
The Catholic Univ. of Korea Eunpyeong St. Mary's hospital
Seoul, South Korea Recruiting -
The Catholic Univ. of Korea Seoul St. Mary's hospital
Seoul, South Korea Recruiting -
Ajou University Hospital
Suwon, South Korea Recruiting -
The Catholic University of Korea, ST. Vincent's Hospital
Suwon, South Korea Recruiting -
Ulsan University Hospital
Ulsan, South Korea Recruiting -
Pusan National University Yangsan Hospital
Yangsan, South Korea Recruiting -
Yonsei University Yongin Severance Hospital
Yongin-si, South Korea Recruiting -
Gyeongsang National University Changwon Hospital
Changwon, South Korea Withdrawn -
Sungkyunkwan University Samsung Changwon Hospital
Changwon, South Korea Withdrawn -
Dankook University Hospital
Cheonan, South Korea Withdrawn -
Gangwon National Univ. Hospital
Chuncheon, South Korea Not yet recruiting -
Hallym University Chuncheon Sacred Heart Hospital
Chuncheon, South Korea Not yet recruiting -
Yeungnam University Medical Center
Daegu, South Korea Withdrawn -
Jeonbuk National University Hospital
Jeonju, South Korea Withdrawn -
Kwangju Christian Hospital
Kwangju, South Korea Withdrawn -
Ewha Womans University Medical Center
Seoul, South Korea Withdrawn
Study contacts
- Study coordinator: Jeong-youn Bae, RN
- Email: cvcrc10@amc.seoul.kr
- Phone: 82230107259
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.