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Gelusil

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 Gelusil?

Gelusil is a combination medicine that helps treat heartburn, acid indigestion, upset stomach, bloating from gas, or stomach discomfort that happens after eating or drinking too much.

Gelusil 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 Gelusil?

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

You must chew the chewable tablet before swallowing it.

Shake the oral suspension (liquid) before measuring a dose. Use the dosing cup provided, or 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 some antibiotics. Do not take any other medicine within 2 hours before or 2 hours after you take Gelusil.

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.

Gelusil side effects

Get emergency medical help if you have signs of an allergic reaction: hives; trouble 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 can 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 Gelusil is taken as needed, you may not have a regular dosing schedule. If you miss a dose and it's close to the time for your next dose, skip the missed dose. Do not take two doses at once.

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 Gelusil.

This section was rewritten for readability and reviewed for meaning.

What other drugs will affect Gelusil?

Other drugs may affect Gelusil, including prescription and over-the-counter medicines, vitamins, and herbal products. Inform 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.