Magnesium hydroxide


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By Medicover Hospitals / 16 Feb 2021
Home | Medicine | Magnesium hydroxide

What is Magnesium hydroxide?

  • Magnesium is a natural mineral. Magnesium hydroxide decreases stomach acid and increases the amount of water in the intestines that may induce the movements of bowel. Magnesium hydroxide is used as a laxative for the relief of occasional constipation. Magnesium hydroxide is also used as an antacid to relieve indigestion, stomach acid, and heartburn.
    1. Magnesium hydroxide Uses
    2. Magnesium hydroxide Side effects
    3. Precautions
    4. Magnesium hydroxide Vs Magnesium oxide
    5. Frequently Asked Questions
    6. Citations

    Magnesium hydroxide Uses:

    • This medicine is used for a short time to treat occasional constipation. It is a laxative (osmotic type) that is thought to work by drawing water into the intestines, an effect that helps to cause bowel movements. It is also used to treat symptoms caused by too much stomach acid, such as heartburn, stomach upset, or indigestion. It's an antacid that works by lowering the amount of acid in the stomach.
    • Constipation- Taking magnesium by mouth is helpful as a laxative for constipation and for preparing the intestine for medical treatment.
    • Indigestion- Taking magnesium as an antacid by mouth reduces the symptoms of heartburn. Various magnesium compounds may be used, but magnesium hydroxide appears to work fastest.
    • Deficiency of magnesium- Taking magnesium is helpful in the treatment and prevention of magnesium deficiency. Magnesium deficiency usually occurs when people have liver disorders, heart failure, vomiting or diarrhoea, kidney dysfunction, and other conditions.
    • High blood pressure in pregnancy- (pre-eclampsia and eclampsia). Administering magnesium intravenously (via IV) or as a shot is considered the treatment of choice for the reduction of high blood pressure during pregnancy (pre-eclampsia) and for the treatment of eclampsia, including the development of seizures. Research suggests that the use of magnesium reduces the risk of seizures.

    How to use Magnesium Hydroxide Suspension

  • Take the product by mouth as directed. For the chewable shape, chew thoroughly before swallowing. Shake the bottle well before each dose for the liquid form. Carefully measure your dose using a special measuring device/spoon. Do not use a household spoon because you may not have the correct dose. If you are taking this medicine for constipation, drink a full glass of water (8 ounces or 240 milliliters) with each dose. Follow all the given directions on the product package or use it as directed by your doctor.
  • Extended use or overuse of this drug for constipation may result in laxative dependence and ongoing constipation. Overuse may also cause persistent diarrhea, loss of too much body water (dehydration), and mineral imbalance.
  • Inform the doctor if your condition persists or continues to get worse. For constipation problems, bowel movements may take between 30 minutes and 6 hours. Tell your doctor if this product does not cause bowel movements, if you need to use this or other laxative products on a regular basis for more than 1 week or if you have rectal bleeding. If you have stomach acid problems, do not take the maximum dose of this medicine for more than 2 weeks unless directed by your doctor.
  • Magnesium Hydroxide Side Effects:

    • Abdominal cramping
    • Diarrhea
    • Electrolyte imbalance
    • Low blood pressure (hypotension)
    • Muscle weakness
    • Respiratory depression
    • Nausea
    • Vomiting
    • Dizziness
    • Weakness
    • Lightheadedness
    • Fast breathing
    • Loose
    • Watery
    • Frequent stools


    • Tell your doctor and pharmacist if you are allergic to magnesium hydroxide, any other drugs, or any of the ingredients in magnesium hydroxide preparations. Ask your pharmacist or check the list of ingredients on the product label.
    • Tell your doctor and pharmacist what kind of prescription and non-prescription medications, vitamins, nutritional supplements, and herbal medications you are taking or plan to take. Your doctor may need to change the doses of your medication or monitor you carefully for side effects.
    • If you are taking other medications, take them at least 2 hours before or 2 hours after you have taken magnesium hydroxide.
    • Tell your doctor if you have stomach pain, nausea, vomiting, or sudden bowel changes lasting more than 2 weeks. Also, tell your doctor if you have or have had kidney disease.
    • Inform your doctor if you are pregnant, or planning to become pregnant, or are breast-feeding. Call your doctor if you become pregnant while taking magnesium hydroxide.

    Magnesium hydroxide Vs Magnesium oxide:

    Magnesium hydroxide
    Magnesium oxide
    Inorganic compound White hygroscopic solid mineral
    Formula: Mg(OH)2 Formula: MgO
    As a laxative, magnesium hydroxide is used to alleviate frequent constipation. This drug is a mineral supplement that is used to avoid low levels of magnesium in the blood and to treat it.
    Molar mass: 58.3197 g/mol Molar mass: 40.3044 g/mol

    Frequently Asked Questions:

    Magnesium hydroxide is used as a laxative for the relief of occasional constipation. Magnesium hydroxide is also used as an antacid to relieve indigestion, stomach acid, and heartburn.
    All of the magnesium hydroxide dissolved dissolves into ions. Since the dissociation of this small amount of dissolved magnesium hydroxide is complete, magnesium hydroxide is considered to be a strong electrolyte. Its low solubility makes it a weak foundation.
    Concentrated sodium hydroxide, calcium hydroxide, magnesium hydroxide, and potassium hydroxide, when ingested, are strong irritants and corrosive to the skin, eyes, respiratory tract, and gastrointestinal system.
    Magnesia milk is also known as magnesium hydroxide, its chemical name. Magnesia milk can be bought over the counter without a prescription. People should not give magnesia milk to children under 2 years of age unless advised by a doctor.
    It is usually taken as a single daily dose (preferably at bedtime) or can be divided into two or more parts over a single day. Magnesium hydroxide usually causes bowel movements within 30 minutes to 6 hours after taking it.
    Magnesium hydroxide, Mg(OH)2, is a white powder produced in large quantities from seawater by the addition of lime milk (calcium hydroxide). It is the primary raw material in the production of magnesium metal and is used as a fire retardant additive.
    Magnesium hydroxide is an inorganic agent. It is naturally found to be a mineral brucite. Magnesium hydroxide may be used as an antacid or as a laxative in either an oral liquid suspension or a chewable tablet form.
    Research shows that supplemental magnesium can improve sleep quality, especially in people with poor sleep. Magnesium may also help insomnia associated with a restless-leg syndrome sleep disorder. Reducing stress and stabilizing mood. Magnesium increases GABA, which promotes both relaxation and sleep.


  • Effects of magnesium hydroxide,
  • Treatment of Renal Calcium Stones,