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Mylanta One

Generic name: calcium carbonate, magnesium hydroxide, and simethicone

Brand names: Mylanta Coat and Cool, Mylanta One, Mylanta Tonight, Rolaids Advanced

Last updated November 2, 2026 0 views
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What is Mylanta One?

Mylanta One is a medicine that combines antacid and anti-gas ingredients, used by adults and children who are at least 12 years old to help relieve heartburn, upset stomach, or acid indigestion.

Mylanta One may also be used for reasons that are not mentioned in this medication guide.

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How should I take Mylanta One?

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

Your dose may change if you switch to a different brand, strength, or form of this medicine. Avoid medication errors by using exactly as directed on the label, or as prescribed by your doctor.

Mylanta One oral suspension is usually taken between meals, at bedtime, or as directed by your doctor.

Shake the oral suspension (liquid). Measure a dose with the supplied measuring device (not a kitchen spoon).

You must chew the chewable tablet before you swallow it. Follow your doctor's dosing instructions very carefully.

Do not take more than your recommended dose or use this medicine more often than prescribed.

An antacid is usually taken for a short time until your symptoms clear up. Call your doctor if your symptoms do not improve after 2 weeks or if they get worse.

Store at room temperature away from moisture and heat. Do not allow the oral suspension to freeze.

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Warnings

Follow all directions on the label and package.

Use exactly as directed.

Tell your healthcare provider if you use other medicines or have other medical conditions or allergies.

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Before taking this medicine

You should not use Mylanta One if you are allergic to it or any of its ingredients.

Ask a doctor or pharmacist if Mylanta One is safe to use if you have or have ever had:

  • if you are on a low-magnesium diet;
  • have a medical condition or take any other medicines; or
  • kidney disease.

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

Do not give this medicine to a child without medical advice.

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Carbonate, magnesium hydroxide, and simethicone side effects

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

Less serious side effects may happen more often, or you might not experience any at all.

This is not a full list of side effects, and other side effects may happen. Contact your doctor for medical advice about side effects. You can report side effects to the FDA at 1-800-FDA-1088.

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What happens if I miss a dose?

Mylanta One is used as needed. If you are following a dosing schedule, do not take any missed dose.

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What happens if I overdose?

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

Antacids can make it harder for your body to absorb other medicines you take by mouth. - Avoid taking other medications at the same time you take Mylanta One.

  • Ask a doctor or pharmacist before using over-the-counter medicines that may contain ingredients similar to Mylanta One.

This section was rewritten for readability and reviewed for meaning.

What other drugs will affect carbonate, magnesium hydroxide, and simethicone?

Other drugs may affect Mylanta One, including prescription and over-the-counter medicines, vitamins, and herbal products. Inform your doctor about all other medicines you are taking.

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.