Fast Relief * Heartburn * Acid Indigestion * Sour Stomach Alka-Seltzer Effervescent Antacid in water contains principally the antacids sodium citrate and potassium citrate. Does Not Contain Aspirin. Take Alka-Seltzer any time - morning, noon, or night - when you need relief from heartburn, acid indigestion, or sour stomach. Alka-Seltzer, the name you trust for fast, effective relief, offers a full range of products for your different needs. * For a fast-acting antacid and pain reliever, try Alka-Seltzer Original, Lemon Lime, or Cherry. * For a chewable antacid rich in calcium, try convenient Alka-Mints. * For an antacid in an easy-to-swallow form, try Alka-Seltzer Antacid Liquid Gelcaps. * For gas pains, pressure and boating, try Alka-Seltzer Anti-Gas, in easy-to-swallow liquid gelcaps. * And for fast relief of your worst cold & flue symptoms, try Alka-Seltzer Plus Cold Medicine. Made in U.S.