Main Page | See live article | Alphabetical index An antacid is a chemical that is swallowed in order to buffer gastric acid, raising the pH to reduce acid damage and relieve heartburn. Some also adsorb bile salts. Common types are: Aluminum and magnesium hydroxide (Maalox®, Mylanta®) Aluminum carbonate gel (Basajel®) Aluminum hydroxide (Amphojel®, AlternaGEL®) Calcium carbonate (Tums®, Titralac®, Calcium Rich Rolaids®) Magnesium hydroxide (Phillips’ Milk of Magnesia®) Sodium bicarbonate This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.