Study to Evaluate the Efficacy and Safety of DWP14012-based Triple Therapy in Eradication of Helicobacter Pylori

Inclusion Criteria: 1. Adult males and females ≥19 and ≤75 years of age at the time of giving informed consent 2. Those who have all positive test results for H. pylori (13C-urea breath test and CLO) at screening visit (Visit 1) * A positive 13C-UBT result * A positive CLO result 3. Those who require treatment for H. pylori eradication as at least one of the following applies: * Those who have peptic ulcer (gastric ulcer or duodenal ulcer) based on an upper gastrointestinal (GI) endoscopy at screening visit (Visit 1) * Those who have chronic atrophic gastritis based on an upper GI endoscopy at screening visit (Visit 1) * Those with a history of endoscopic resection of early gastric cancer or gastric adenoma Exclusion Criteria: 1. Those with significant upper GI bleeding 2. Those with a history of a surgical procedure that might affect gastric acid secretion (upper GI resection or vagotomy), or who are scheduled to undergo such procedure during this study 3. Those with Zollinger-Ellison syndrome or other gastric acid hypersecretion disorders 4. Those with a history of treatment for H. pylori eradication 5. Those with a history of any malignancy within recent 5 years prior to screening visit (Visit 1) * However, they can participate if 5 years have passed without recurrence after determined to achieve a complete remission (the complete removal of tumors through surgical procedures or the end of anticancer therapy) * Still, those with a history of malignancies in the digestive system, except early gastric cancer under the inclusion criteria, are excluded irrespective of a complete remission 6. Those who have experienced acute coronary artery disease (unstable angina, myocardial infarction, coronary artery bypass graft, percutaneous coronary intervention), peripheral arterial disease and cerebrovascular disease (transient ischemic attack, stroke) within 24 weeks prior to screening visit (Visit 1) 7. Those with clinically significant systemic bleeding disorders, coagulation disorders, or severe blood disorders that make them ineligible for participation in this study 8. Those with acquired immunodeficiency syndrome (AIDS) or viral hepatitis (tested positive for HBs antigen or HCV antibody) (However, subjects who are negative for HCV-RNA can participate.) 9. Those who meet the following criteria according to the results of the hepatic or renal level test performed at screening visit (Visit 1) * At least one of ALT, AST, ALP, γ-GTP and total bilirubin \> 2 times the upper limit of normal * BUN \> 2 times the upper limit of normal * Creatinine clearance (CrCl) ≤ 30 mL/min 10. Patients with uncontrolled hypertension (systolic blood pressure of ≥ 160 mmHg or diastolic blood pressure of ≥ 100 mmHg at screening) 11. Patients with uncontrolled diabetes (HbA1c \> 9.0 % at screening) 12. Patients with one or more of the following: * Heart failure (NYHA Class III \~ IV) * History of QT prolongation or ventricular arrhythmias (including Torsades de pointes) 13. Patients with hypokalemia (Potassium \< 3 mmol/L at screening) 14. Patients with hypomagnesemia (Magnesium \< 1.2 mg/dL at screening) 15. Those with clinically significant mental disorders 16. Patients with central nervous system infection 17. Patients with infectious mononucleosis 18. Those with a history of drug or alcohol abuse within recent 1 year prior to screening visit (Visit 1) 19. Those with a history of hypersensitivity or allergy to the IP, amoxicillin, clarithromycin, drugs used for 13C-UBT, or premedications for an upper GI endoscopy, or their components 20. Those with a history of hypersensitivity or allergy to proton pump inhibitors (PPIs), potassium-competitive acid blockers (P-CABs), benzimidazoles, penicillin antibiotics, or macrolide antibiotics 21. Those who are taking, or need to take, at least one of the following: * Atazanavir, Rilpivirine, or drugs that contain any of them * Pimozide, Domperidone * Ergot alkaloid and its derivatives (Ergotamine, Dihydroergotamine, etc.) * Mizolastine * Ticagrelor * Colchicine 22. Those who have a history of use of any PPIs, P-CABs or H2-receptor antagonists within recent 14 days prior to 13C-UBT of screening visit (Visit 1), or who need to take any of them during the study 23. Those who have a history of use of bismuth or any antibiotics known to be effective at eradication of H. pylori within recent 28 days prior to 13C-UBT of screening visit (Visit 1), or who need to take any of them during the study 24. For those using antibiotic resistance test results or samples prior to the screening visit (Visit 1), the subjects who have a history of antibiotic use from the time the results or samples were obtained (up to 90 days prior to the screening visit) 25. Those with genetic problems such as galactose intolerance, Lapp lactase deficiency, or glucose-galactose malabsorption 26. Those to whom an upper GI endoscopy cannot be performed 27. Pregnant or lactating women 28. Those who do not agree to use a proper contraception throughout the study duration * Proper contraception methods for the subject or his/her partner * Sterilization (vasectomy, etc.), or intrauterine devices (copper loop, intrauterine systems containing hormones) * Combined use of barrier methods with any one of non-oral hormonal contraceptives or spermicides * Combined use of a cervical cap or contraceptive diaphragm with male condoms 29. Those who have participated in other studies, and have been treated with the IP or medical device at least once within 4 weeks prior to participating in this study 30. Those deemed ineligible to participate in this study based on the investigator's other medical opinions