Oxetacaine is a topical anaesthetic, which effectively relieves pain when applied to the lining of the mouth and food pipe. The antacids neutralize stomach acid and prevent further irritation of the food pipe. Antacid also thickens the liquid to help carry the oxetacaine and coat the food pipe. Aluminium Hydroxide acts on the hydrochloric acid in the stomach by neutralization, forming Aluminium Chloride salt and water. Magnesium Hydroxide increases peristaltic activity causing osmotic retention of fluids, thus resulting in bowel evacuation. It also reduces stomach acid by reacting with hydrochloric acid to form Magnesium Chloride.
