 Participants with ongoing erosive esophagitis EE will receive lansoprazole 30 mg once daily for 4 or 8 weeks the Healing phase until healing of EE is confirmed by endoscopy performed at either Week -4 andor Day 1 before eligible for randomization to maintenance phase. In Maintenance phase, participants with confirming EE healing will be asked to take 2 tablets and a capsule at the same time each morning after breakfast throughout the study. All participants will be asked to record daytime and nighttime during sleep subjective symptoms in a diary on a daily basis. 