Maalox Antacid Suspension Maalox Antacid Suspension contains a combination of two antacids to lower the amount of acid in your stomach to relieve heartburn & indigestion. It can also be used for gastritis (inflammation of the stomach) & may be prescribed by a doctor to lower the amount of acid in your stomach or gut when you have an ulcer. Maalox Antacid has a pleasant, minty flavour.