Stomach settler is a term used to describe a type of medication that helps to reduce the symptoms of indigestion. Bromo, BICARB and ANTACID are all common types of stomach settler. Bromo is a brand name for bromide, a chemical compound used to treat digestive problems. BICARB is short for sodium bicarbonate, an alkaline substance used to neutralize stomach acid. ANTACID is a generic term for a variety of medications that help to reduce the amount of acid in the stomach. All three of these medications can be used to help relieve the symptoms of indigestion.