Final answer:
Antacids are medications used to neutralize excess stomach acid and relieve symptoms of ulcers. They work by chemically neutralizing gastric acid in the stomach, reducing damage and relieving pain.
Step-by-step explanation:
Antacids are medications used to neutralize excess stomach acid and relieve symptoms of ulcers such as burning pain and indigestion. They work by chemically neutralizing the gastric acid in the stomach, reducing damage and relieving pain. For example, the antacid Maalox contains alkaline ions that react with stomach acid to produce water and salt.