For quick relief from acidity and indigestion, you can take an over-the-counter antacid containing magnesium hydroxide or calcium carbonate. To target gas and bloating, medications containing simethicone are very effective. For longer-lasting acid prevention, an H2 blocker like famotidine or a proton pump inhibitor like omeprazole can be taken before meals. Additionally, try to avoid spicy or fatty foods, carbonated drinks, and lying down immediately after eating. If your symptoms are severe, do not improve after two weeks, or are accompanied by difficulty swallowing, please consult a healthcare professional for a proper evaluation.