DROXAINE

Oxetacaine is a potent surface analgesic with the molecular formula N, N-bis-(N-methyl-N-phenyl-t-butyl-acetamide)-beta-hydroxyethylamine that conserves its unionized form at low pH levels. Its actions have shown to relieve dysphagia, relieve pain due to reflux, chronic gastritis, and duodenal ulcer.

Aluminium hydroxide is a slow-acting antacid. It is used to provide symptomatic relief in gastric hyperacidity. In addition, the antipeptic and demulcent activity of aluminium hydroxide helps to protect inflamed gastric mucosa against further irritation by gastric secretions.

Magnesium hydroxide is practically insoluble in water and solution is not effected until the hydroxide reacts with hydrochloric acid in the stomach to form magnesium chloride. Its neutralising action is almost equal to that of sodium bicarbonate. When the dose is in excess of that required to neutralise the acid the intragastric pH may reach pH 8 or 9. Acid rebound following magnesium hydroxide is clinically insignificant. Magnesium hydroxide has an indirect cathartic effect resulting from water retention in the intestinal lumen.