Maalox® Plus is used to treat the symptoms of too much stomach acid such as stomach upset, heartburn, and acid indigestion. It is also used to relieve symptoms of extra gas such as belching, bloating, and feelings of pressure/discomfort in the stomach/gut. Benefits: To relieve an upset stomach, heartburn, and indigestion. For the relief of extra gas such as belching, bloating, and feelings of pressure/discomfort in the stomach/gut.