While it may not feel like it when you’re in pain, your digestive system is efficiently built to digest your food. When you eat or drink, food travels down your esophagus. Your lower esophageal sphincter (LES) opens to let the food into your stomach and closes tightly after the food has passed. In your stomach, the food is broken down by acids and passed on to your small intestine. Gastro Intestinal drugs treats frequent, persistent heartburn symptoms due to acid reflux disease. These symptoms typically occur on 2 or more days per week despite treatment and diet change.