Milk of Magnesia Liquid Milk of Magnesia Liquid can be used as an antacid or a laxative. Milk of Magnesia Liquid is an alkaline suspension, meaning that it will cause neutralization when it encounters anything acidic. This is why it makes an excellent antacid, as it neutralizes excess stomach acid (hydrochloric acid (HCL) when swallowed. Left untreated, excess stomach acid will cause heartburn, indigestion & stomach ulcers. Milk of Magnesia Liquid used as an antacid works when the hydroxide ions combine with the hydrogen ions in HCL to reduce the excess activity in the stomach. When used as a laxative, Milk of Magnesia Liquid helps to flush the intestines by stimulating intestinal motility. The magnesium ions pull water from the surrounding body tissues via osmosis. The extra water in the intestines softens & increases the amount of feces, which in turn stimulates the nerves in the intestines. The ions also release the hormone cholecystokinin, causing an increase of water & electrolytes in the intestine & causing intestinal motility. Ingredients The active ingredient is Magnesium Hydroxide (415mg/5ml). The other ingredients are Sodium Hydrogen Carbonate, Oil of Peppermint, Glycerol, Sodium Saccharin & Purified Water. Directions Use a 5 ml spoon or the dosing cup provided. Doses may be taken with milk or water if desired. Do not exceed the stated dose. As an antacid: Adults: 5-10 ml (one or two 5 ml spoonfuls or fill the dosing cup to the first or second line). Repeat as necessary to a maximum of 60 ml in 24 hours. Children aged 3-12 years: 5 ml (one spoonful or first line in dosing cup). Repeat as necessary to a maximum of 30 ml in 24 hours. As a laxative: Adults: 30-45 ml at bedtime. Repeat nightly, reducing dose each night until constipation is relieved. Children aged over 3 years: 5-10 ml at bedtime. Children aged under 3 years: to be given only on the advice of a doctor. Elderly: As adult dose.