This is a multicenter, placebo-controlled, randomized, double-blinded, paralleled group clinical study to evaluate the efficacy of 2-week treatment with DA-9601 tab in patients with acute or chronic gastritis. Subject will receive DA-9601 180mg, 360mg tab or Placebo., three times a day for two weeks.

Inclusion Criteria:

• Patients who are diagnosed with acute gastritis and chronic gastritis by endoscopy; have gastric mucosal lesions such as erosion, bleeding, redness, swelling on the site; and have subjective and objective symptoms requiring medical treatment ② 18 years old or older, 75 years old or younger ③ Patients who have agreed with the terms of clinical trials

Exclusion Criteria:

• Patients with peptic ulcer (excluding scars) and reflux esophagitis

  • Patients who were administered with H2 antagonist, muscarine receptor antagonist or nonsteroidal anti-inflammatory drug within 2 weeks prior to the start of the trial

    • Patients using protective agent enhancers at the start of the trial ④ Patients with recurrence observed during maintenance therapy at the start of the trial

      • Patients with a history of gastrectomy

        • Patients with severe disorders of the liver, kidneys, heart, lungs, blood, etc. ⑦ Patients with duodenal ulcer ⑧ Patients with gastrointestinal malignancy