Gaviscon Syrup 200ml is an over-the-counter antacid and anti-reflux medication used to relieve the symptoms of heartburn, acid indigestion, and acid reflux. The syrup works by forming a protective barrier on top of the stomach contents, which helps prevent acid from moving back into the esophagus, thus reducing the discomfort caused by acid reflux or gastroesophageal reflux disease (GERD). It is available in a liquid form and can be taken easily for fast relief.