On this page · 9 sections

Gas-X

Generic name: simethicone

Brand names: Alka-Seltzer Anti-Gas, Bicarsim, Gas Aide, Gas Relief Extra Strength, Gas Relief Ultra Strength Softgels, Gas-X Extra Strength, Gas-X Maximum Strength, Gas-X Ultra Softgels, Little Tummys, Mi-Acid Gas Relief, Mylanta Gas Maximum Strength, Mylanta Gas Minis Assorted Fruit, Mylanta Gas Minis Cherry, Mylanta Gas Minis Mint, Mylicon, Phazyme, Phazyme Fast Gels, Bicarsim Forte, Gas-X, SimePed

Last updated November 2, 2026 0 views
Share

What is Gas-X?

Gas-X helps relieve painful pressure from too much gas in the stomach and intestines. This medicine can be used by babies, children, and adults.

Gas-X may also be used for other reasons that are not mentioned in this medication guide.

This section was rewritten for readability and reviewed for meaning.

How should I take Gas-X?

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

Do not take more of this medicine than directed.

Gas-X works best if you take it after meals and at bedtime.

You must chew the chewable tablet before you swallow it.

Measure liquid medicine carefully. Use the dosing syringe provided, or use a medicine dose-measuring device (not a kitchen spoon).

Gas-X liquid drops can be mixed with water, baby formula, or other liquids to make swallowing easier for an infant or child.

Always follow directions on the medicine label about giving Gas-X to a child. Call your doctor if the child's gas symptoms do not improve after treatment with this medicine.

You may need to follow a special diet or increase your exercise while using Gas-X. Follow all instructions from your doctor or dietitian. Learn about the foods to eat or avoid to help control your condition.

Store at room temperature away from moisture, heat, and light. Do not allow the liquid form of this medicine to freeze.

This section was rewritten for readability and reviewed for meaning.

Warnings

Follow all instructions on your medicine label and package. Inform all your healthcare providers about your medical conditions, allergies, and all medicines you are taking.

This section was rewritten for readability and reviewed for meaning.

Before taking this medicine

You should not use Gas-X if you are allergic to it.

Ask a doctor or pharmacist if it is safe for you to take Gas-X if you are allergic to any drugs, or if you have any serious illness (especially one that affects your stomach or intestines).

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

The liquid form may contain phenylalanine. Talk to your doctor before using this form of simethicone if you have phenylketonuria (PKU).

This section was rewritten for readability and reviewed for meaning.

Gas-X 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.

You may experience less serious side effects, or you might not have any side effects at all.

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

This section was rewritten for readability and reviewed for meaning.

What happens if I miss a dose?

Since Gas-X is taken as needed, you might not have a regular dosing schedule. If you miss a dose and it's almost time for your next dose, 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 help or call the Poison Help line at 1-800-222-1222.

Talk to your doctor before using an antacid, and only use the type your doctor suggests. Some antacids may have Gas-X in them.

This section was rewritten for readability and reviewed for meaning.

What other drugs will affect Gas-X?

Other drugs may affect Gas-X, including prescription and over-the-counter medicines, vitamins, and herbal products. Inform your doctor about all your current medicines and any medicine you begin or stop using.

This section was rewritten for readability and reviewed for meaning.

Frequently asked questions

  • Which is more effective, Beano or Gas-X for gas from ulcerative colitis?

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.
General medicine information Consumer-friendly language

Content is provided for education and is not medical advice. See our medical disclaimer.