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Mi-Acid

Generic name: aluminum hydroxide, magnesium hydroxide, and simethicone

Brand names: Almacone, Gelusil, Mag-al Plus, Milantex, Mylanta Maximum Strength, Mi-Acid, Mintox, Rulox

Last updated November 2, 2026 0 views
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What is Mi-Acid?

Mi-Acid is a combination medicine that helps to treat heartburn, acid indigestion, upset stomach, bloating from gas, or stomach discomfort from overeating or drinking too much.

Mi-Acid may also be used for other reasons not mentioned in this medication guide.

This section was rewritten for readability and reviewed for meaning.

How should I take Mi-Acid?

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.

This section was rewritten for readability and reviewed for meaning.

Warnings

This medicine can make it harder for your body to absorb other medicines, especially certain antibiotics. Do not take any other medicine within 2 hours before or 2 hours after you take Mi-Acid.

This section was rewritten for readability and reviewed for meaning.

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:

  • kidney disease; or
  • if you are on a low-magnesium diet.

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.

This section was rewritten for readability and reviewed for meaning.

Mi-Acid side effects

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

This medicine may cause serious side effects. Stop using this medicine and call your doctor right away 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 happen more often, 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.

This section was rewritten for readability and reviewed for meaning.

What happens if I miss a dose?

Since Mi-Acid is used as needed, you might not have a regular dosing schedule. If you miss a dose and it’s almost time for your next one, just skip the missed dose. Do not take two doses at the same time.

This section was rewritten for readability and reviewed for meaning.

What happens if I overdose?

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

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 Mi-Acid.

This section was rewritten for readability and reviewed for meaning.

What other drugs will affect Mi-Acid?

Other drugs may affect Mi-Acid, including prescription and over-the-counter medicines, vitamins, and herbal products. Tell your doctor about all the medicines you are currently taking and any medicine you begin or stop using.

This section was rewritten for readability and reviewed for meaning.

Related medicines

Before you take this medicine: the information on this page is general and may not cover your personal circumstances. Read the label supplied with your medicine and ask a pharmacist or doctor if you are unsure, especially if you are pregnant, breastfeeding, taking other medicines or managing a long-term condition.
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Content is provided for education and is not medical advice. See our medical disclaimer.