Sodium Bicarbonate (500mg) Tablet is used in the treatment of Indigestion. It is an antacid that is used to relieve acid indigestion, heartburn, and gas. Sodium Bicarbonate (500mg) Tablet relieves irritation by producing carbon dioxide which neutralizes the acid present in the stomach. It also increases the pH of blood and urine, thereby correcting acid indigestion, heartburn. Additionally, it helps in the removal of toxic substances from the body in certain types of poisoning.