Gas-X Ultimate Strength Softgels simethicone 500mg 20-count US box

Gas-X Ultimate Strength 500mg Softgels Drug Facts ingredients and directions panel

Gas-X Ultimate Strength 500mg infographic for gas pressure bloating and discomfort

Banner image: Gas-X Ultimate Strength 500mg Softgels 20-count front packaging

Gas-X infographic about gas and bloating during a GLP-1 journey

Infographic for Gas-X Ultimate Strength gas pressure bloating and discomfort

Gas-X Ultimate Strength 500mg Softgels UK | 20 Count

£29.99 - £29.99

£29.99

£29.99 - £29.99

£29.99

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Ultimate Strength · 20 Softgels

Gas Relief in One Softgel.500mg Ultimate Strength.

Gas-X Ultimate Strength Softgels contain 500mg simethicone per softgel for relief of gas-related pressure, bloating and fullness. This US-market formula comes in a 20-softgel pack and is available to buy in the UK through Kingdom States.

500mg per softgel20-softgel packSwallow with water

Active ingredient in each softgel500mgSimethicone
Anti-Gas Medicine

How Gas-X works

Helps Break Up Trapped Gas Bubbles.

Simethicone helps break up gas bubbles in the digestive tract so the body can pass the gas naturally. Ultimate Strength is labelled for the pressure, bloating and fullness commonly described as gas.

This formula contains simethicone as its only active ingredient. It is an anti-gas medicine rather than an antacid for heartburn.

01 · Choose the format

A Softgel Taken with Water.

Ultimate Strength is a liquid-filled softgel. The labelled method is to swallow it with water after meals or at bedtime. Gas-X chewable tablets are a different format with different directions, so check the exact product before use.

02 · Understand the pack

20 Softgels. The Same 500mg Strength.

Every softgel in the pack contains 500mg simethicone. The pack count tells you how many softgels are supplied; it does not mean you should take one every day. Use only as directed on the supplied label.

03 · Compare the strength

How Ultimate Compares with Maximum.

One Ultimate Strength softgel contains 500mg simethicone, compared with 250mg in one Maximum Strength softgel. The manufacturer's “2×” comparison describes this amount per softgel; it does not mean twice the effectiveness. Follow each product's own directions.

Know the Gas-X range

Ultimate Strength Is the 500 mg Softgel.

Gas-X uses several strength names. Check the milligrams on the pack, not the name alone, so you select the intended product and follow the correct directions.

Extra Strength125 mgSimethicone per unit

Ultra Strength180 mgSimethicone per softgel

Maximum Strength250 mgSimethicone per softgel

This product · Ultimate Strength500 mgSimethicone per softgel

Strength comparison is for identification only. Directions vary by product; always read and follow the Drug Facts label on the exact pack received.

Read before use

Safety & Important Information

Current US label directions

For adults and children aged 12 years and over: swallow one softgel with water after meals or at bedtime.

Maximum: one softgel in 24 hours, unless a doctor advises and supervises otherwise. Follow the directions and age guidance on the pack supplied.

Check the pack and ingredients

Keep out of reach of children.
Do not use if the blister is broken or damaged.
The formula contains gelatin and soy lecithin. Check the full ingredient list if you have an allergy or dietary restriction.
Store at 20–25°C and protect from light, heat and moisture.

If you are unsure whether this medicine is suitable for you, ask a pharmacist or doctor. Read all product information before use and retain the carton.

Why Kingdom States?

US Gas-X. Available in the UK.

You can buy US-market Gas-X Ultimate Strength 500mg Softgels in the UK through Kingdom States, a specialist importer of American health and personal-care products. Orders are dispatched through the UK delivery network. This listing is for the 20-softgel pack; check the label supplied with your order before use.

Product information checked 16 October 2026 against official Gas-X Ultimate Strength information and the US Drug Facts label. Further reading: Gas-X and antacids. Always read the label supplied with your product.

Gas-X range guide

Compare Gas-X Strengths and Formats

Compare labelled simethicone strengths, formats and pack-size options listed in the Kingdom States Gas-X collection.

Gas-X variant	Simethicone	Format	Listed pack sizes	What makes it different
Ultimate Strength Current product	500mgPer softgel	SoftgelsSwallow with water	20 softgels	Highest simethicone strength per softgel in the current Gas-X range.
Maximum Strength Current product	250mgPer softgel	SoftgelsSwallow with water	30 or 50Softgels	Provides more simethicone per softgel than Ultra Strength, with two pack-size options.
Ultra Strength Current product	180mgPer softgel	SoftgelsSwallow with water	18 or 50Softgels	180mg per softgel, compared with 125mg in each Extra Strength chewable tablet.
Extra Strength Cherry Creme Peppermint Creme Current product	125mgPer tablet	Chewable tabletsTwo flavour choices	48 or 72Chewable tablets	The chewable format, listed in Cherry Creme and Peppermint Creme flavours. Check the selected flavour for stock status.

Looking for a different Strength?

Four Gas-X softgel supplement boxes arranged in a fan shape on a white background, showing Extra Strength, Ultra Strength, Maximum Strength, and Ultimate Strength variants.

Browse our GAS-X collection

Available in different strength SoftGels & Chewable, flavoured Tablets.

See collection

Can you buy Gas-X Ultimate Strength in the UK?

Yes, you can buy Gas-X Ultimate Strength in the UK through specialist importers like Kingdom States. This listing is for the US-market 20-softgel pack, containing 500mg simethicone in each softgel.

What is Gas-X Ultimate Strength used for?

The US label describes relief of pressure, bloating and fullness commonly referred to as gas. Each softgel contains 500mg simethicone, which helps break up gas bubbles in the digestive tract so the body can pass the gas naturally.

How do you take Gas-X Ultimate Strength Softgels?

Adults and children aged 12 years and over should swallow one softgel with water after meals or at bedtime. Follow the directions on the pack supplied. Do not exceed one softgel in 24 hours except under a doctor’s advice and supervision.

How many Ultimate Strength softgels can you take in 24 hours?

The labelled maximum is one 500mg softgel in 24 hours, except under a doctor’s advice and supervision. This daily limit applies to Ultimate Strength. Other Gas-X strengths and formats have their own directions.

How is Ultimate Strength different from Maximum Strength?

One Ultimate Strength softgel contains 500mg simethicone; one Maximum Strength softgel contains 250mg. The manufacturer’s “2×” comparison refers to this amount per softgel, not twice the effectiveness. The products have different labelled daily limits, so follow the exact pack selected.

How many softgels are in the pack?

This listing is for a pack of 20 Gas-X Ultimate Strength softgels. Each softgel contains 500mg simethicone. A 20-count pack is not an instruction to take the product every day or a fixed treatment course.

Is Gas-X Ultimate Strength an antacid?

No. Ultimate Strength contains simethicone as its only active ingredient. It is labelled for gas symptoms rather than neutralising stomach acid. Gas-X Total Relief Chews are a separate formula containing an antacid ingredient.

Do Ultimate Strength softgels contain soy or gelatin?

Yes. The official inactive ingredient list includes soy lecithin and gelatin. Check the full ingredient list on the supplied pack if you have an allergy or dietary restriction; do not assume this softgel formula is soy-free or vegetarian.

How quickly can Gas-X Ultimate Strength work?

The manufacturer states that Gas-X Ultimate Strength goes to work in minutes. The time to relief varies between people. Do not take extra softgels to seek faster relief or exceed the labelled daily limit.

Always follow the physical Drug Facts label

Read all product information before use and retain the carton. Do not use if the blister is broken or damaged, and keep the medicine out of reach of children.

Label-Led Product Guidance

Usage, Ingredients & Drug Facts.

Directions, full ingredient information and label-backed precautions for Gas-X Ultimate Strength 500mg Softgels.

500mgSimethicone
Anti-Gas Medicine

Active ingredientSimethicone 500mgIn each softgel

Product formatLiquid-Filled SoftgelsSwallow with water

Pack size20 SoftgelsUS-market retail pack

DirectionsHow to Take Gas-X Ultimate Strength

Check the Age

The US directions are for adults and children aged 12 years and over.

Swallow with Water

Swallow one softgel with water. These are softgels, a different format from Gas-X chewable tablets.

Use at Labelled Times

Take after meals or at bedtime, following the directions on the supplied pack.

Observe the Daily Limit

Do not exceed one softgel in 24 hours except under a doctor’s advice and supervision.

Check the Exact Product

These directions apply to Ultimate Strength 500mg softgels. Other Gas-X strengths and formats have their own directions and daily limits.

For Children Under 12

The label provides no directions for children under 12. Ask a doctor or pharmacist before use by a younger child.

FormulaActive & Inactive Ingredients

500mgUltimate Strength

Active Ingredient in Each Softgel

Simethicone

Purpose: anti-gas. Labelled for relief of pressure, bloating and fullness commonly referred to as gas.

Inactive Ingredients — Ultimate Strength

D&C red no. 27 aluminum lake, gelatin, glycerin, medium-chain triglycerides, pharmaceutical ink, purified water, soy lecithin.

This list follows the official US Drug Facts label and matches the photographed Ultimate Strength pack. The formula includes gelatin and soy lecithin. Check the ingredients on the physical pack supplied if you have an allergy or dietary restriction.

SafetyWarnings & Precautions

Check the Blister

Do not use if the blister is broken or damaged.

Daily Maximum

One softgel in 24 hours is the labelled maximum, except under a doctor’s advice and supervision.

Ingredient Sensitivities

Check the full ingredient list, including soy lecithin and gelatin, for anything you need to avoid.

Unsure About Suitability?

The manufacturer advises speaking to a doctor or pharmacist if you are uncertain whether Gas-X is appropriate for you.

Product CareStorage & Additional Guidance

20°C–25°C

Controlled Room Temperature

Store within the labelled range of 68°F–77°F.

PROTECT

Light, Heat & Moisture

Protect the softgels from light, heat and moisture, and check the blister before use.

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