Contacid is an antacid containing magaldrate and simethicone.Magaldrate Simethicone suspension an antacid is used for the treatment of acid indigestion flatulence heartburn gas and dyspepsia. The combination of drugs acts by neutralizing the gastric acid pH and increase the acid pH. The anti-flatulent property of the drug works by breaking up gas bubbles and eliminate intestinal gas Contacid Syrup is used mainly used for treating heartburn gas acid indigestion and sour stomach. Use under medical supervision.