GENERIC NAME: simethicone
BRAND NAME: Phazyme, Mi-Acid, Gas Relief, Mytab Gas, Gas-X, Gas-X Extra Strength, Gas-X Ultra Strength
DISCONTINUED BRANDS: Equalizer Gas Relief, Gas Free, Gas Free Extra Strength, Flatulex, Mylicon, and Mylanta Gas
GENERIC AVAILABLE: Yes
SIDE EFFECTS: Common side effects may include:
PREPARATIONS: Liquid drops: 40 mg per 0.6 ml. Chewable tablets: 40, 80 and 125 mg. Capsules: 125 and 180 mg.
DRUG INTERACTIONS: There are no known drug interactions with simethicone.
PREGNANCY AND BREASTFEEDING SAFETY: Safety during pregnancy has not been adequately evaluated. Simethicone is generally considered safe during pregnancy because it does not cross the placenta.
Simethicone is considered safe during lactation because it is not absorbed into the body and infants are often treated with simethicone.
STORAGE: Preparations should be stored at room temperature, 15 C - 30 C (59 F - 86 F).
DOSING: The recommended dose for relieving gas is 40-125 mg 4 times daily after meals and at bedtime. The drops can be mixed with water, infant formula or other liquids for use in small children.
DRUG CLASS AND MECHANISM: Simethicone is an anti-gas (anti-flatulence) medication. It acts in the stomach and intestines to change the surface tension of gas bubbles, enabling their breakdown and the formation of larger bubbles. In this way it is believed that gas can be eliminated more easily by belching or passing flatus. Simethicone was approved by the FDA in 1952.
Medically reviewed by Eni Williams, PharmD, PhD
FDA Prescribing Information.
Black R, Hill A. Over the counter medications in pregnancy. Am Fam Physician. 2003 Jun 15;67(12):2517-2524.
Quick GuideDigestive Disorders: Common Misconceptions
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
Need help identifying pills and medications?
Use the pill identifier tool on RxList.