Adults: Gastric ulcer: The usual dose is 20 mg of vonoprazan once a day. Administration should be limited to 8 weeks.
Duodenal ulcer: The usual dose is 20 mg of vonoprazan once a day. Administration should be limited to 6 weeks.
Reflux esophagitis (erosive esophagitis): The usual dose is 20 mg of vonoprazan once a day. Administration should be limited to 4 weeks. However, when the effect is insufficient, treatment may be continued for up to 8 weeks. In addition, for the maintenance of healing of reflux esophagitis in patients with repeat recurrence and relapse of the condition, a dose of 10 mg is administered once a day; however, when the efficacy is inadequate, a dose of 20 mg may be administered once a day. The duration of administration in the long-term efficacy clinical Study OCT-001 is up to 52 weeks.