Long-Term Safety Study of TAK-438 in the Maintenance Treatment of Healed Erosive Esophagitis

Inclusion criteria

• Participants must have successfully completed the preceding phase 3 double-blind study (TAK-438/CCT-002: preceding study) and have endoscopically healed EE at Week 2, 4, or 8 in the preceding study.*

• "Endoscopically healed EE" is defined as those participants who have endoscopically confirmed EE of Grade O as defined by the Los Angeles (LA) Classification Grading System.
• Outpatient (including inpatient for examination)

Exclusion criteria

• Participants with an esophagus-related complication (eosinophilic esophagitis, esophageal varices, scleroderma, viral or fungal infection, esophageal stenosis, etc.), a history of radiotherapy or cryotherapy of the esophagus, a caustic or physiochemical trauma (esophageal sclerotherapy, etc.). However, participants with Schatzki's ring (mucosal tissue ring around inferior esophageal sphincter) or Barrett's esophagus are allowed to be included.
• Participants who have received surgery or treatment affecting gastroesophageal reflux (cardioplasty, dilation of esophageal stenosis [excluding Schatzki's ring], etc.), or who have a history of surgery of stomach or duodenum (excluding removal of benign polyp under endoscopy)
• Participants who have acute upper gastrointestinal bleeding, gastric or duodenal ulcer (mucosal defect with white coating) within 30 days prior to Visit M-1 (initiation of study drug administration). However, participants with gastric or duodenal erosions are allowed to be included.
• Participants with a previous or current history of Zollinger-Ellison syndrome, or other gastric acid hypersecretion disorder