Categories October Surprise 2024 OTC Heartburn Drugs for GERD: Antacids, Acid Blockers, and More – WebMD Post author By Post date March 18, 2023 Nonprescription medications used to treat heartburn include: Antacids for Heartburn. Antacids neutralize stomach acid to cut down on heartburn, sour stomach, acid indigestion, and stomach upset.