Pharmacology: Pharmacodynamics: Calcium salts neutralize gastric acidity resulting in increased gastric and duodenal bulb pH; they additionally inhibit the proteolytic activity of pepsin if the pH is greater than 4 and increase lower esophageal sphincter tone. The calcium released from calcium carbonate is known to increase peristalsis in the esophagus, pushing the acid into the stomach and provide relief from symptoms of heartburn.
Sodium bicarbonate is an alkalinizing agent that dissociates to provide bicarbonate ion. Bicarbonate in excess of that needed to buffer hydrogen ions causes systemic alkalinization and when taken orally, sodium bicarbonate neutralises stomach acid.
Light Magnesium carbonate reacts with hydrochloric acid in the stomach to form carbon dioxide and magnesium chloride thus neutralizing excess acid in the stomach.
Simethicone is a silicone compound that functions as a non-systemic surfactant, decreasing the surface tension of gas bubbles in the GI tract. This action results in coalescence and dispersion of the gas bubbles allowing their removal from the GI tract as flatulence or belching. Simethicone causes the gas bubbles to accumulate and therefore pass more easily either through the upper GI or lower GI opening.
Pharmacokinetics: The mode of action of the medicinal product is physical and does not depend on absorption into the systemic circulation.