Maalox Oral Suspension - Peppermint Flavour (250ml). Maalox Oral Suspension contains two dierent medicines. They are called magnesium hydroxide and aluminium hydroxide.. They belong to a group of medicines called antacids.. Maalox Oral Suspension is used for the relief of indigestion (dyspepsia) Maalox Oral Suspension works by lowering the amount of acid in your stomach.