GERD is a chronic (long-term) condition that is like having heartburn consistently rather than just occasionally. It happens because a muscle above your stomach relaxes too much and allows stomach contents to come back up into your esophagus and mouth. RZOLE 20 Tablet belongs to a group of medicines called proton pump inhibitors. It reduces the amount of acid your stomach makes and relieves the pain associated with heartburn and acid reflux. You should take it exactly as it is prescribed for it to be effective.