Generic name: simethicone (sye METH i cone)
Brand name: Alka-Seltzer Anti-Gas, Bicarsim, Bicarsim Forte, Gas Aide, Gas-X, Little Tummys, Mi-Acid Gas Relief, Mylanta Gas Maximum Strength, Mylicon, Phazyme, SimePed
Drug class: Miscellaneous GI agents
What is Gas-X?
Gas-X is used to relieve painful pressure caused by excess gas in the stomach and intestines. This medicine is for use in babies, children, and adults.
Gas-X may also be used for purposes not listed in this medication guide.
Follow all directions on your medicine label and package. Tell each of your healthcare providers about all your medical conditions, allergies, and all medicines you use.
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 type of serious illness (especially one that affects your stomach or intestines).
Ask a doctor before using this medicine if you are pregnant or breastfeeding.
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 of 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.
What happens if I miss a dose?
Since Gas-X is used when needed, you may not be on a dosing schedule. Skip any missed dose if it's almost time for your next dose. Do not use two doses at one time.
What happens if I overdose?
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.
What should I avoid while taking Gas-X?
Ask your doctor before using an antacid, and use only the type your doctor recommends. Some antacids may contain Gas-X.
Gas-X side effects
Get emergency medical help if you have signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Less serious side effects may be more likely, 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 may report side effects to FDA at 1-800-FDA-1088.
What other drugs will affect Gas-X?
Other drugs may affect Gas-X, including prescription and over-the-counter medicines, vitamins, and herbal products. Tell your doctor about all your current medicines and any medicine you start or stop using.
Frequently asked questions
More about Gas-X (simethicone)
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- Drug class: miscellaneous GI agents
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Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
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