This study is checking if the medicine dexlansoprazole can heal and keep healing a condition called erosive esophagitis (EE) in kids aged 2 to 11. EE happens when acid from the stomach hurts the tube (esophagus) that carries food from the mouth to the stomach. This study involves taking a capsule every day for up to 10 months. It will be split into two parts: healing EE for 8 weeks, then keeping it healed for another 16 weeks. During this time, kids will visit the clinic for checkups. After finishing the main part of the study, there will be a follow-up phase lasting up to 3 months. Families will keep track of symptoms in a diary and may need to come back to the clinic each month during follow-up.

• The study lasts up to 10 months with multiple clinic visits.
• Participants will take medication daily and record symptoms.
• Eligibility includes ages 2-11 with a history of GERD symptoms.