Phase 4 Study of Sto M Tab. in Acute or Chronic Gastritis

A Randomized, Double-blinded, Active Controlled, Non-Inferiority, Multicenter, Phase IV Clinical Trial to Evaluate the Efficacy and Safety of Sto M Tab. in Patients With Acute or Chronic Gastritis

This Phase 4, multicenter, randomized, double-blind, active-controlled, non-inferiority study aims to evaluate the non-inferiority of Stoem Tab. compared to Stillen Tab. (Dong-A ST Co., Ltd.) in patients with acute or chronic gastritis. Participants will receive either Stoem Tab. or Stillen Tab. for 2 weeks. The primary outcome is the effective rate of gastric mucosal erosion at Week 2, assessed by upper gastrointestinal endoscopy and evaluated by an independent reviewer, defined as the proportion of participants achieving at least a 50% improvement in erosion score compared to baseline.

Study Overview

• Status: Not yet recruiting
• Conditions: Gastritis; Acute Gastritis; Chronic Gastritis
• Intervention / Treatment: Drug: Sto M Tab.; Drug: Stillen Tab.

Detailed Description

This Phase 4 clinical trial will assess the efficacy and safety of Stoem Tab. compared to Stillen Tab. in adults with acute or chronic gastritis. Participants will be randomized in a double-blind, parallel, active-controlled design to receive either Stoem Tab. or Stillen Tab. for 2 weeks. The primary endpoint is the effective rate of gastric mucosal erosion at Week 2, assessed by upper gastrointestinal endoscopy and evaluated by an independent reviewer. A responder is defined as a participant whose erosion score at Week 2 has improved by at least 50% compared to baseline (i.e., a decrease from grade 4 to grade 2 or 1, or from grade 3 or 2 to grade 1). The effective rate is calculated as the proportion of responders among the evaluable participants. Secondary endpoints include additional efficacy and safety evaluations. The study aims to demonstrate the non-inferiority of Stoem Tab. to Stillen Tab. All participants will be monitored for efficacy, safety, and medication compliance, and standard eligibility criteria will be applied.

• Study Type: Interventional
• Enrollment (Estimated): 470
• Phase: Phase 4

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult; Older Adult
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

1. Male or female adults aged 19 to 75 years at the time of screening.
2. Participants diagnosed with acute or chronic gastritis by upper gastrointestinal endoscopy performed within 7 days prior to randomization (Visit 2), with at least one gastric erosion confirmed. Erosions of the esophagus and duodenum are excluded.
3. Female participants of childbearing potential or male participants who agree to maintain sexual abstinence or use appropriate contraceptive methods during the study period and for 2 weeks after the last administration of the investigational product. Periodic abstinence, such as calendar, ovulation, symptothermal, or post-ovulation methods, is not considered an acceptable contraceptive method.
4. Participants who voluntarily provide written informed consent to participate in this clinical trial.

Exclusion Criteria:

1. Participants with any of the following lesions confirmed or accompanied by upper gastrointestinal endoscopy at screening (Visit 1): active or healing peptic ulcer; reflux esophagitis; Barrett's esophagus greater than 3 cm; gastroesophageal varices; esophageal stricture; or other clinically relevant lesions. Participants with ulcer scars may be enrolled.
2. Participants who have a history of gastric acid secretion-inhibiting surgery or gastric or esophageal surgery at screening (Visit 1).
3. Participants who have been diagnosed with or have a history of Zollinger-Ellison syndrome at screening (Visit 1).
4. Participants with inflammatory bowel disease, such as Crohn's disease, ulcerative colitis, or intestinal Behcet's disease; primary esophageal motility disorder; or pancreatitis at screening (Visit 1).
5. Participants with a history of malignancy within 5 years prior to screening (Visit 1). However, participants who have been completely treated and have had no recurrence for at least 5 years may be enrolled at the investigator's discretion. Participants with gastrointestinal malignancy are excluded regardless of the time since diagnosis. Participants with basal cell carcinoma, squamous cell carcinoma of the skin, thyroid cancer, or carcinoma in situ of other sites may be enrolled at the investigator's discretion if they have been completely treated and have had no recurrence for at least 3 years.
6. Participants with current or prior thrombotic disease at screening (Visit 1), such as cerebral thrombosis, myocardial infarction, thrombophlebitis, or venous thrombosis.
7. Participants diagnosed with disseminated intravascular coagulation at screening (Visit 1).
8. Participants with concomitant hepatic, renal, cardiac, pulmonary, hematologic, or other diseases that, in the investigator's judgment, may affect the efficacy or safety evaluations.
9. Participants with current or prior lipid metabolism disorders at screening (Visit 1), such as hyperlipidemia or diabetic hyperlipidemia, or participants who require cautious administration of lipid nutritional products. However, participants whose condition is adequately controlled with medication may be enrolled at the investigator's discretion.
10. Participants with hereditary problems such as galactose intolerance, Lapp lactase deficiency, or glucose-galactose malabsorption.
11. Participants with a history of hypersensitivity to soybean, peanut, or soybean oil.
12. Participants with a history of hypersensitivity to any component of the investigational products, such as tartrazine.
13. Participants with clinically significant psychiatric disease at screening (Visit 1).
14. Participants who meet any other exclusion criteria related to prior or concomitant medications specified in the protocol.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Quadruple

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Sto M Tab. Group	Drug: Sto M Tab.; Sto M Tab., oral, three times daiy, 2 weeks
Active Comparator: Stillen Tab. Group	Drug: Stillen Tab.; Stillen Tab., oral, three times daily, 2 weeks

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Effective Rate of Gastric Mucosal Erosion Assessed by an Independent Reviewer	Proportion of participants whose erosion score improved by at least 50% from baseline to Week 2, as assessed by upper gastrointestinal endoscopy and evaluated by an independent reviewer.	Baseline and Week 2

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Effective Rate of Gastric Mucosal Erosion Assessed by the Investigator	Proportion of participants whose erosion score improved by at least 50% from baseline to Week 2, as assessed by upper gastrointestinal endoscopy.	Baseline and Week 2
Complete Cure Rate of Gastric Mucosal Erosion Assessed by the Investigator	Proportion of participants with complete resolution of gastric mucosal erosion at Week 2, as assessed by upper gastrointestinal endoscopy.	Week 2
Complete Cure Rate of Gastric Mucosal Edema Assessed by the Investigator	Proportion of participants with complete resolution of gastric mucosal edema at Week 2, as assessed by upper gastrointestinal endoscopy.	Week 2
Effective Rate of Gastric Mucosal Redness Assessed by the Investigator	Proportion of participants whose redness score improved by at least 50% from baseline to Week 2, as assessed by upper gastrointestinal endoscopy.	Baseline and Week 2
Effective Rate of Gastric Mucosal Hemorrhage Assessed by the Investigator	Proportion of participants whose hemorrhage score improved by at least 50% from baseline to Week 2, as assessed by upper gastrointestinal endoscopy.	Baseline and Week 2
Improvement Rate of Subjective Symptom Score Assessed by the Investigator	Proportion of participants whose total subjective symptom score improved by at least 50% from baseline to Week 2, as assessed by a self-reported questionnaire.	Baseline and Week 2

Collaborators and Investigators

• Sponsor: Mather's Pharm. Co., Ltd.

Study record dates

Study Major Dates

• Study Start (Estimated): June 1, 2026
• Primary Completion (Estimated): February 1, 2028
• Study Completion (Estimated): February 1, 2028

Study Registration Dates

• First Submitted: June 1, 2026
• First Submitted That Met QC Criteria: June 1, 2026
• First Posted (Actual): June 5, 2026

Study Record Updates

• Last Update Posted (Actual): June 5, 2026
• Last Update Submitted That Met QC Criteria: June 1, 2026
• Last Verified: May 1, 2026

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Digestive System Diseases; Gastrointestinal Diseases; Stomach Diseases; Gastroenteritis; Gastritis; DA 9601
• Other Study ID Numbers: MTS-STO-401

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No