What is simethicone?

Simethicone allows gas bubbles in the stomach and intestines to come together more easily, which allows for easier passage of gas.

Simethicone is used to relieve painful pressure caused by excess gas in the stomach and intestines. Simethicone is for use in babies, children, and adults.

Simethicone may also be used for other purposes not listed in this medication guide.


You should not use this medication if you are allergic to simethicone.

Before taking simethicone, tell your doctor if you are allergic to any drugs.

Also tell your doctor if you have any type of serious illness, especially one that involves your stomach or intestines.

FDA pregnancy category C. It is not known whether this medication is harmful to an unborn baby. Before taking simethicone, tell your doctor if you are pregnant or plan to become pregnant during treatment.

It is not known whether simethicone passes into breast milk or if it could harm a nursing baby. Do not use this medication without telling your doctor if you are breast-feeding a baby.

Follow your doctor’s instructions about any restrictions on food, beverages, or activity while you are using simethicone.

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Seek emergency medical attention if you think you have used too much of this medicine.

An overdose of simethicone is not likely to cause life-threatening symptoms.

Since simethicone is taken as needed, you may not be on a dosing schedule. If you are taking the medication regularly, take the missed dose as soon as you remember. If it is almost time for your next dose, wait until then to take the medicine and skip the missed dose. Do not take extra medicine to make up the missed dose.

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Side effects

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

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.

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There may be other drugs that can interact with simethicone. Tell your doctor about all your prescription and over-the-counter medications, vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start a new medication without telling your doctor.

Other Names

Alka-Seltzer Anti-Gas, Colic Drops, Colicon, Equalize Gas Relief Drops, Flatulex Drops, Gas Aide, Gas X Extra Strength, Gas-X, Gas-X Extra Strength, Gas-X Liquid Extra Strength, Gas-X Maximum Strength, Gas-X Thin Strips, Gas-X Thin Strips Cinnamon, Gas-X Thin Strips Peppermint, Genasyme, Gerber Gas Relief, Infantaire Gas Relief, Little Tummys, Maalox Anti-Gas, Maalox Anti-Gas Extra Strength, Major-Con, Maximum Strength Mylanta Gas, Maximum Strength Phazyme 125 Softgels, Mi-Acid Gas Relief, Micon-80, Mylanta Gas, Mylanta Gas Maximum Strength, Mylaval, Mylicon, Mytab Gas, Ovol, Phazyme, Phazyme Maximum Strength, Phazyme Ultra, Phazyme Ultra Strength, Phazyme-125, Phazyme-95, simethicone, Gas Free Extra Strength, Gas-X Infant Drops, Gas-X Tongue Twisters Thin Strips Children's, and Majorcon

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