Gas-X

Simethicone · Capsule, Liquid Filled · Oral

Over the counter

Active ingredient

Active ingredients (per tablet) Calcium carbonate 750 mg Simethicone 250 mg

Purpose

Purposes Antacid Antigas

Uses

Uses for the relief of pressure, bloating, and fullness commonly referred to as gas gas associated with heartburn, sour stomach or acid indigestion acid indigestion heartburn sour stomach upset stomach associated with these symptoms

Warnings

Warnings Ask a doctor or pharmacist before use if you are presently taking a prescription drug. Antacids may interact with certain prescription drugs. When using this product do not exceed 2 tablets in 24 hours except under the advice and supervision of a doctor do not use the maximum dosage for more than 2 weeks, except under the advice and supervision of a doctor If pregnant or breast-feeding, ask a health professional before use. Keep out of reach of children.

Ask a doctor or pharmacist

Ask a doctor or pharmacist before use if you are presently taking a prescription drug. Antacids may interact with certain prescription drugs.

When using this product

When using this product do not exceed 2 tablets in 24 hours except under the advice and supervision of a doctor do not use the maximum dosage for more than 2 weeks, except under the advice and supervision of a doctor

Pregnancy or breast-feeding

If pregnant or breast-feeding, ask a health professional before use.

Keep out of reach of children

Keep out of reach of children.

Directions

Directions adults and children 12 years and older: chew 1 or 2 tablets as symptoms occur, or as directed by a doctor. Chew or crush tablets completely before swallowing. do not take for symptoms that persist for more than 2 weeks unless advised by a doctor

Other information

Other information each tablet contains: elemental calcium 300 mg do not store above 25°C (77°F) contains FD&C Yellow No. 5 (tartrazine) as a color additive

Inactive ingredients

Inactive ingredients acacia, beeswax, carmine, carnauba wax, citric acid, corn starch, corn syrup, dextrin, FD&C blue no.2 aluminum, FD&C red no. 40, FD&C red no. 40 aluminum lake, FD&C yellow no. 5 aluminum lake (tartrazine), maltodextrin, medium chain triglycerides, methylparaben, natural and artificial flavors, pharmaceutical ink, phosphoric acid, propylene glycol, propylparaben, purified water, shellac, sodium benzoate, sorbic acid, sorbitol, soy lecithin, sucrose, titanium dioxide, vegetable oil

Questions?

Questions or comments? 1-800-452-0051

Label text from the FDA structured product label by Haleon US Holdings LLC (revised Jul 15, 2025). Long sections are shortened; the complete label is on DailyMed.

Active ingredients

Gas-X NDC products (8)

NDCStrength & formLabelerType
0067-0117Dimethicone, Unspecified 125 mg/1
Tablet, Chewable		Haleon US Holdings LLCOTC MONOGRAPH DRUG
0067-0118Calcium Carbonate 750 mg/1; Dimethicone, Unspecified 250 mg/1
Tablet, Chewable		Haleon US Holdings LLCOTC MONOGRAPH DRUG
0067-0119Calcium Carbonate 750 mg/1; Dimethicone 250 mg/1
Tablet, Chewable		Haleon US Holdings LLCOTC MONOGRAPH DRUG
0067-0129Dimethicone, Unspecified 125 mg/1
Tablet, Chewable		Haleon US Holdings LLCOTC MONOGRAPH DRUG
0067-6274Dimethicone 180 mg/1
Capsule, Liquid Filled		Haleon US Holdings LLCOTC MONOGRAPH DRUG
0067-6275Dimethicone, Unspecified 125 mg/1
Capsule, Liquid Filled		Haleon US Holdings LLCOTC MONOGRAPH DRUG
0067-6283Dimethicone 250 mg/1
Capsule, Liquid Filled		Haleon US Holdings LLCOTC MONOGRAPH DRUG
0067-8075Dimethicone, Unspecified 500 mg/1
Capsule, Liquid Filled		Haleon US Holdings LLCOTC MONOGRAPH DRUG

Frequently asked questions

What is Gas-X used for?

Uses for the relief of pressure, bloating, and fullness commonly referred to as gas gas associated with heartburn, sour stomach or acid indigestion acid indigestion heartburn sour stomach upset stomach associated with these symptoms

Who makes Gas-X?

Gas-X is listed by 1 labeler in the FDA NDC directory, including Haleon US Holdings LLC.