After vonoprazan (20mg/day) or esomeprazole (20mg/day) for 4weeks is prescribed for patients with erosive esophagitis diagnosed by esophagogastroduodenoscopy, the number of patients who will visit our outpatient clinic again due to some reasons without any appointments is compared with vonoprazan group and esomeprazole.

1. Patients who have erosive esophagitis diagnosed by esophagogastroduodenoscopy is enrolled.
2. Vonoprazan (20mg/day) or esomeprazole (20mg/day) is prescribed for 4weeks the patients randomly without next appointments.
3. Some patients may visit our outpatient clinic again due to some reasons without any appointments.
4. The number of the patients who revisit our outpatient clinic again is compared with vonoprazan group and esomeprazole.

Inclusion Criteria:

• outpatients belonging to American Society of Anesthesiologists class I or II
• patients have erosive esophagitis diagnosed by esophagogastroduodenoscopy shortly before the prescription

Exclusion Criteria:

• other acid blockers are taken