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Mylanta (aluminum and magnesium hydroxide + simethicone)

Written by Stephanie Nera, RPh, PharmD · Pharmacology

Updated Jun 05, 2021

Mylanta is the brand name of a combination of drugs which include aluminum hydroxide, magnesium hydroxide, and simethicone.

Aluminum hydroxide and magnesium hydroxide are both antacids which work to neutralize excess acid in the stomach. Simethicone is an antiflatulence agents which reduces bloating due to intestinal gas.

Mylanta may not be available in the Philippines at this time. An alternative to consider is Maalox.



What is Mylanta used for?

Mylanta is commonly used to treat heartburn, hyperacidity, and gas. It may be given to you for other reasons. Talk with the doctor for more information.

How should I take Mylanta?

Use this medicine as ordered by your doctor. Read all information given to you. Follow all instructions closely.

Take Mylanta after meals and at bedtime or as you have been told by your doctor.

For the chewable tablets, it is important to chew them thoroughly. Do not swallow the tablet or dissolve it in water.

For the liquid dosage form, shake well before each use. Measure liquid doses carefully. For accuracy, use a medical-grade measuring cup not a household spoon.

How do I store Mylanta?

Mylanta is best stored at room temperature away from direct light and moisture. To prevent drug damage, you should not store it in the bathroom or the freezer. There may be different brands that may have different storage needs. It is important to always check the product package for instructions on storage, or ask your pharmacist. For safety, you should keep all medicines away from children and pets.

You should not flush this product down the toilet or pour them into a drain unless instructed to do so. It is important to properly discard this product when it is expired or no longer needed. Consult your pharmacist for more details about how to safely discard your product.

Precautions & warnings

What should I know before using Mylanta?

Before using this drug, tell your doctor if you are/have:

  • Pregnant or breastfeeding
  • Taking any other medicines. This includes any medicines you are taking which are available to buy without a prescription, such as herbal and complementary medicines.
  • Allergy with any of active or inactive ingredients of Mylanta or other medications
  • Any other illnesses, disorders, or medical conditions
  • Kidney problems

Tell all of your health care providers that you take this medicine. This includes your doctors, nurses, pharmacists, and dentists.

If you are on a low-magnesium diet, talk with your doctor.

This medicine may prevent other drugs taken by mouth from getting into the body. If you take other drugs by mouth, you may need to take them at some other time than this medicine. Talk with your doctor.

Is it safe during pregnancy or breastfeeding?

There isn’t enough information about the safety of using Mylanta during pregnancy and breastfeeding. Therefore, always consult with your doctor to weigh the potential benefits and risks before taking Mylanta.

Side effects

What side effects can occur from Mylanta?

Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:

Not everyone experiences these side effects. Additionally, there may be other side effects not listed above. If you have any concerns about a side effect, please consult your doctor or pharmacist.


What drugs may interact with Mylanta?

This drug may interact with other drugs that you are currently taking, which can change how your drug works or increase your risk for serious side effects. To avoid any potential drug interactions, you should keep a list of all the drugs you are using (including prescription drugs, nonprescription drugs, and herbal products) and share it with your doctor and pharmacist. For your safety, do not start, stop, or change the dosage of any drugs without your doctor’s approval.

Does food or alcohol interact with Mylanta?

This drug may interact with food or alcohol by altering the way the drug works or increase the risk for serious side effects. Please discuss with your doctor or pharmacist any potential food or alcohol interactions before using this drug.

What health conditions may interact with Mylanta?

This drug may interact with your health condition. This interaction may worsen your health condition or alter the way the drug works. It is important to always let your doctor and pharmacist know all the health conditions you currently have.


The information provided is not a substitute for any medical advice. Therefore, you should always consult with your doctor or pharmacist before using any medication.

What is the dose for an adult?

Take 2 to 4 tablets 3 to 4 times a day. Be sure to chew the tablet thoroughly, not swallow it.

Do not exceed 24 tablets per day unless directed by your doctor.

What is the dose for a child?

The dosage has not been established in pediatric patients. It may be unsafe for your child. It is always important to fully understand the safety of the drug before using. Please consult with your doctor or pharmacist for more information.

How is Mylanta available?

Mylanta is available in the following dosage forms and strengths:

  • Chewable tablets – Original, Double Strength
  • Fast-chew tablets
  • Liquid

What should I do in case of an emergency or overdose?

In case of an emergency or an overdose, call your local emergency services or go to the nearest emergency room.

What should I do if I miss a dose?

If you miss a dose, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and take your regular dose as scheduled. Do not take a double dose.


Hello Health Group does not provide medical advice, diagnosis or treatment.

Written by

Stephanie Nera, RPh, PharmD


Updated Jun 05, 2021

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