aluminum hydroxide, magnesium hydroxide, and simethicone (Alamag Plus, Aldroxicon I, Aldroxicon II)

Brand Names: Alamag Plus, Aldroxicon I, Aldroxicon II, Almacone, Almacone-2, Comfort Gel Extra Strength, Comfort Gel Original, Di-Gel, Gelusil, Geri-Lanta, Geri-Lanta Maximum Strength, Geri-Mox, Maalox Advanced Maximum Strength, Maalox Advanced Regular Strength, Maalox Antacid Antigas Regular Strength, Maalox Max, Maalox Max Wild Berry, Maalox Plus, Magaant, Mag-al Plus, Mag-al Plus XS, Maldroxal Plus, Masanti, Masanti DS, Masanti II, Mi-Acid, Mi-Acid II, Mi-Acid Maximum Strength, Milantex, Milantex Maximum Strength, Mintox, Mintox Maximum Strength, Mintox Plus, Mylagen, Mylagen-II, Mylanta, Mylanta DS Fast Acting, Mylanta Fast Acting, Mylanta Maximum Strength, Mylanta Maximum Strength Cherry, Mylanta Maximum Strength Vanilla Caramel, Ri-Gel II, Ri-Mox Plus, Rulox, Tempo, Uni-Lan, Uni-Lan II, Urban, Urban DS

Generic Name: aluminum hydroxide, magnesium hydroxide, and simethicone

What is aluminum hydroxide, magnesium hydroxide, and simethicone?

Aluminum hydroxide, magnesium hydroxide, and simethicone is a combination medicine used to treat heartburn, acid indigestion, upset stomach, bloating caused by gas, or stomach discomfort caused by eating or drinking too much.

Aluminum hydroxide, magnesium hydroxide, and simethicone may also be used for purposes not listed in this medication guide.

What are the possible side effects of this medicine?

Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Stop using this medicine and call your doctor at once if you have:

  • bone pain, muscle weakness;
  • confusion, changes in your mental state, seizure (convulsions); or
  • pale skin, feeling light-headed or short of breath, rapid heart rate.

Less serious side effects may be more likely, and you may have none at all.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

What is the most important information I should know about this medicine?

This medicine can make it harder for your body to absorb other medicines, especially certain antibiotics. Avoid taking any other medicine within 2 hours before or 2 hours after you take aluminum hydroxide, magnesium hydroxide, and simethicone.

What should I discuss with my healthcare provider before taking this medicine?

You should not use this medicine if you are allergic to aluminum hydroxide, magnesium hydroxide, or simethicone.

Ask a doctor or pharmacist if this medicine is safe to use if you have:

Ask a doctor before using this medicine if you are pregnant or breastfeeding.

Do not give this medicine to a child younger than 12 years old without medical advice.

How should I take this medicine?

Use exactly as directed on the label, or as prescribed by your doctor.

You must chew the chewable tablet before you swallow it.

Shake the oral suspension (liquid) before you measure a dose. Use the dosing cup provided, or use a medicine dose-measuring device (not a kitchen spoon).

Do not take more than the maximum dose recommended on the medicine label. Do not take this medicine at maximum doses for longer than 2 weeks in a row.

An antacid is usually taken for a short time until your symptoms clear up. Call your doctor if your symptoms do not improve within 2 weeks of taking this medicine.

Store at room temperature away from moisture and heat. Do not allow liquid medicine to freeze.

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What happens if I miss a dose?

Since this medicine is used when needed, you may not be on a dosing schedule. Skip any missed dose if it's almost time for your next dose. Do not use two doses at one time.

What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

What should I avoid while taking this medicine?

This medicine can make it harder for your body to absorb other medicines, especially certain antibiotics. Avoid taking any other medicine within 2 hours before or 2 hours after you take aluminum hydroxide, magnesium hydroxide, and simethicone.

What other drugs will affect this medicine?

Other drugs may affect aluminum hydroxide, magnesium hydroxide, and simethicone, including prescription and over-the-counter medicines, vitamins, and herbal products. Tell your doctor about all your current medicines and any medicine you start or stop using.

Where can I get more information?

Your pharmacist can provide more information about aluminum hydroxide, magnesium hydroxide, and simethicone.


Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.
Every effort has been made to ensure that the information provided by Cerner Multum, Inc. ('Multum') is accurate, up-to-date, and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. Multum information has been compiled for use by healthcare practitioners and consumers in the United States and therefore Multum does not warrant that uses outside of the United States are appropriate, unless specifically indicated otherwise. Multum's drug information does not endorse drugs, diagnose patients or recommend therapy. Multum's drug information is an informational resource designed to assist licensed healthcare practitioners in caring for their patients and/or to serve consumers viewing this service as a supplement to, and not a substitute for, the expertise, skill, knowledge and judgment of healthcare practitioners. The absence of a warning for a given drug or drug combination in no way should be construed to indicate that the drug or drug combination is safe, effective or appropriate for any given patient. Multum does not assume any responsibility for any aspect of healthcare administered with the aid of information Multum provides. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the drugs you are taking, check with your doctor, nurse or pharmacist.

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Reviewed on 7/12/2021

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