Antacids are chemicals that neutralize acids of the stomach. Both acids and alkalis corrode the esophageal and stomach lining. But when they combine in equal strength and quantities, salt and water are formed and the stomach lining is saved from corrosion. The burning pain and heartburn are immediately relieved. Some antacids include alginates that form a gel on the top of the contents of the stomach, preventing the acidic fumes to go up to the esophagus. Antacids are composed of different types of chemicals like aluminum hydroxide, magnesium hydroxide, sodium bicarbonate and calcium bicarbonate. Each of these antacids can buffer or neutralize the acidic stomach. However, some may cause constipation while others may cause diarrhea when consumed in excess.
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