Gastroesophageal reflux disease (GERD) is a chronic (long-term) condition that is like having heartburn consistently rather than just occasionally. It happens because a muscle above the stomach relaxes too much and allows stomach contents to come back up into the esophagus and mouth. Domperi 1mg/ml Suspension helps treat this condition by increasing the tone of the lower end of the food pipe and preventing the entry of acid. You should give it to your child exactly as prescribed for it to be effective.