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More from Magmil

Other strengths and forms by Pacific Pharmaceuticals Ltd.

Indications & Uses

Magmil is indicated for:

Pharmacology

Magnesium Hydroxide is widely known by its common name, Milk of Magnesia. It works as a gentle antacid and laxative. Since it is absorbed poorly and slowly from the gut, it draws and holds fluid within the bowel through its osmotic effect, which is how it produces its laxative action. This makes it useful for clearing the bowel before surgical, radiological, and colonoscopic procedures, and it can also assist in expelling parasites after suitable treatment, as well as removing toxic substances in certain poisoning cases. In the stomach, Magnesium Hydroxide is converted to Magnesium Chloride, a reaction that does not produce carbon dioxide.

Dosage Reference

Reference Information Only

Dosages shown are general references from official sources. Always consult your doctor or pharmacist for personalized dosing.

Adults:

As a laxative, adults take 2 to 4 tablespoonfuls with a full glass of water. Children aged 6 to 11 years take 1 to 2 tablespoonfuls with a full glass of water, and children aged 2 to 5 years take 1 to 3 teaspoonfuls with a full glass of water. As an antacid, adults take 1 to 3 teaspoonfuls (5 to 15 ml) up to 4 times daily with water. Children aged 1 to 3 years take a quarter teaspoonful, children aged 3 to 6 years take a quarter to half a teaspoonful, and children aged 6 to 12 years take half to 1 teaspoonful.

Side Effects

Milk of Magnesia, like other magnesium salts, may cause diarrhoea.

Cautions & Contraindications

Warnings & Precautions

Where possible, this medicine should be avoided in patients with kidney failure or liver failure, and in those with heart block or heart muscle disease. It may be used with caution during pregnancy.

Contraindications

Magnesium Hydroxide should not be used in anyone for whom a laxative is contraindicated. Long-term use of Magnesium Hydroxide is contraindicated in patients with renal failure.

Storage

Keep Magnesium Hydroxide in a cool, dry place and away from light. As with all medicines, keep it out of the reach of children.

Drug Interactions

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Common questions about Magmil 400 mg

What is Magmil 400 mg Suspension?

Magmil 400 mg Suspension is a medicine that contains Magnesium Hydroxide. It is made by Pacific Pharmaceuticals Ltd. It belongs to the Antacid with laxative action group of medicines.

What is Magmil used for?

Magmil is used for: Peptic Ulcer, Constipation, Nausea and Vomiting.

What are the side effects of Magmil?

Milk of Magnesia, like other magnesium salts, may cause diarrhoea.

How should I store Magmil?

Keep Magnesium Hydroxide in a cool, dry place and away from light. As with all medicines, keep it out of the reach of children.

Can I take other medicines with Magmil?

Some medicines can interact with Magnesium Hydroxide, for example: Glucosamine Sulfate + Diacerein, Tolfenamic Acid, Fexofenadine Hydrochloride, Ciprofloxacin, Digoxin, Itraconazole. Tell your doctor or pharmacist about every medicine you take.

Do I need a prescription for Magmil?

Magmil is a prescription (Rx) medicine. Take it as your doctor advises.

Last updated: 15 Aug 2026