Created in 1928 by a Missouri-based pharmacist, Tums? was developed to address his wife?s indigestion; the remedy caught on and soon went into commercial production. Today the heartburn remedy is part of the GlaxoSmithKline product portfolio; the bulk of the production is still done in the original manufacturing facility in St. Louis, built more than 80 years ago. An American icon, the antacid provides relief from acid indigestion, heartburn, upset stomach and indigestion and is considered a calcium supplement. The product line includes regular, extra and ultra strength chewable antacid tablets in a variety of flavors such as tropical fruit and wintergreen; Freshers? chewable antacid tablets with natural mint to help freshen breath; sugar-free antacid calcium supplement tablets and more. The antacid tablets are gluten-free; they buffer and neutralize gastric acid in the esophagus and keep working as they dissolve.