Geri-Lanta contains 200 mg aluminum hydroxide, 200 mg magnesium hydroxide, and 20 mg simethicone in each 5mL dose, for relief of heartburn, sour stomach, acid indigestion, and gas. Compare to active ingredients in Regular Strength Mylanta. Mylanta is a registered trademark of McNeil, a division of Johnson & Johnson Consumer Inc. Active Ingredient: Aluminum hydroxide 200 mg, Magnesium hydroxide 200 mg, Simethicone 20 mg Serving Size of Active Ingredient: adults and children 12 years and older: take 2 to 4 teaspoonfuls between meals, at bedtime, or as directed by a doctor. do not take more than 24 teaspoonfuls in 24 hours. Inactive Ingredients: benzyl alcohol, butylparaben, carboxymethylcellulose sodium, flavor(contains alcohol), hypromellose, microcrystalline cellulose, propylparaben, purified water, saccharin sodium, sorbitol solution. Each 5 mL teaspoonful contains: magnesium 85 mg, sodium 1 mg. Store at room temperature, protect from freezing