• Patient must be 1 to 11 years of age

• Patients must have a clinical history of GERD for at least 3 months before the start of study

• For the healing phase: Patients must have confirmed presence of EE at endoscopy performed within one week of the start of the healing phase.

• For the maintenance phase: Patients must have completed the healing phase and have endoscopy-verified healed EE at the 8-week endoscopy visit.

• Patients must weigh ≥ 10 kg.

• Patients may be male or female.

• All postmenarcheal female patients must have a negative pregnancy test (urine) before starting treatment.

• Sexually active patients must be abstinent or maintain effective contraception from informed consent day up to the last day of study intervention.

• Patient's guardian must be capable of giving signed informed consent