Acid Reducers Relief for Heartburn and Acid Reflux. Antacids reduce the effects of acid in your stomach. Because They do this by neutralizing the acid. H2 blockers reduce the amount of acid your stomach makes. Proton pump inhibitors (PPIs) reduce your body’s production of acid. how to reduce stomach acid? So Some foods that reduce stomach acid, List of Acid Reducer brands plus detailed descriptions, warnings, dosage and directions.