Pharmacotherapeutic Group: Other drugs for peptic ulcer and gastro-oesophageal reflux disease.
Pharmacology: Pharmacodynamics: The medicinal product is a combination of two antacids (calcium carbonate and sodium bicarbonate) and an alginate.
On ingestion, the medicinal product reacts rapidly with gastric acid to form a raft of alginic acid gel having a near neutral pH and which floats on the stomach contents effectively impeding gastro-oesophageal reflux, for up to 4 hours.
In severe cases the raft itself may be refluxed into the oesophagus, in preference to the stomach contents, and exert a demulcent effect.
Calcium carbonate neutralizes gastric acid to provide fast relief from indigestion and heartburn. This effect is increased by the addition of sodium bicarbonate which also has a neutralising action.
Pharmacokinetics: The mode of action of the medicinal product is physical and does not depend on absorption into the systemic circulation.