Alka-Seltzer Anti-Gas

Generic Name: simethicone (sye METH i cone)

Brand Names: Alka-Seltzer Anti-Gas, Equalize Gas Relief Drops, Gas Aide, Gas Free Extra Strength, Gas-X, Gas-X Extra Strength, Gas-X Infant Drops, Gas-X Maximum Strength, Gas-X Thin Strips Cinnamon, Gas-X Thin Strips Peppermint, Gas-X Tongue Twisters Thin Strips Children's, Gas-X Ultra Softgels, Genasyme, Infantaire Gas Relief, Little Tummys, Maalox Anti-Gas, Maalox Anti-Gas Extra Strength, Mi-Acid Gas Relief, Mylanta Gas, Mylanta Gas Maximum Strength, Mylicon, Mytab Gas, Phazyme, Phazyme Maximum Strength, Phazyme Ultra, Phazyme-125, Phazyme-95

What is Alka-Seltzer Anti-Gas (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 purposes not listed in this medication guide.

What is the most important information I should know about Alka-Seltzer Anti-Gas (simethicone)?

Never use more than the recommended dose of simethicone.

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

Simethicone works best if you take it after meals and at bedtime.

Simethicone may be only part of a complete program of treatment that may also include a special diet or increased exercise. It is very important to follow the diet and exercise plan created for you by your doctor or nutrition counselor. You should become very familiar with the list of foods you must avoid to help control your condition.

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.

What should I discuss with my healthcare provider before taking Alka-Seltzer Anti-Gas (simethicone)?

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

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

Simethicone is not expected to harm an unborn baby. It is not known whether simethicone passes into breast milk or if it could harm a nursing baby. Do not use this medication without medical advice if you are breast-feeding a baby.

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

How should I take Alka-Seltzer Anti-Gas (simethicone)?

Use exactly as directed on the label, or as prescribed by your doctor. Do not use in larger or smaller amounts or for longer than recommended.

Do not take more of this medication than is directed.

Simethicone works best if you take it after meals and at bedtime.

The simethicone chewable tablet must be chewed before swallowing.

Measure liquid medicine with a special dose measuring spoon or medicine cup, not with a regular table spoon. If you do not have a dose measuring device, ask your pharmacist for one. Clean the medicine dropper after each use. Allow it to air dry.

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

Children should never be given more than the recommended dose of simethicone. Call your doctor if the child's gas symptoms do not improve after treatment with simethicone.

Simethicone may be only part of a complete program of treatment that may also include a special diet or increased exercise. It is very important to follow the diet and exercise plan created for you by your doctor or nutrition counselor. You should become very familiar with the list of foods you must 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 simethicone is used on an as needed basis, you are not likely to miss a dose. Do not use more of this medication than is directed.

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 Alka-Seltzer Anti-Gas (simethicone)?

Ask a doctor or pharmacist before using any other stomach medicine or antacid. Simethicone is contained in many combination medicines. Taking certain products together can cause you to get too much simethicone.

Alka-Seltzer Anti-Gas (simethicone) 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.

What other drugs will affect Alka-Seltzer Anti-Gas (simethicone)?

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.

More Alka-Seltzer Anti-Gas resources

• Alka-Seltzer Anti-Gas Side Effects (in more detail)
• Alka-Seltzer Anti-Gas Use in Pregnancy & Breastfeeding
• Alka-Seltzer Anti-Gas Support Group
• 0 Reviews for Alka-Seltzer Anti-Gas - Add your own review/rating

• Alka-Seltzer Anti-Gas Advanced Consumer (Micromedex) - Includes Dosage Information


• Simethicone Professional Patient Advice (Wolters Kluwer)


• Simethicone Monograph (AHFS DI)


• Bicarsim MedFacts Consumer Leaflet (Wolters Kluwer)


• Gas-X Chewable Tablets MedFacts Consumer Leaflet (Wolters Kluwer)


• Gas-X Extra Strength MedFacts Consumer Leaflet (Wolters Kluwer)


• Gas-X Infant Drops Liquid Drops MedFacts Consumer Leaflet (Wolters Kluwer)


• Genasyme Suspension MedFacts Consumer Leaflet (Wolters Kluwer)

Compare Alka-Seltzer Anti-Gas with other medications

• Endoscopy or Radiology Premedication
• Functional Gastric Disorder
• Gas
• Postoperative Gas Pains

Where can I get more information?

• Your pharmacist can provide more information about simethicone.

See also: Alka-Seltzer Anti-Gas side effects (in more detail)