Gascon (Simethicone)

What is Gascon?

Gascon is an over-the-counter anti-flatulent medication widely used to relieve painful pressure, bloating, and discomfort caused by excessive trapped gas in the digestive tract. It is frequently utilized for daily symptomatic relief and as a clinical preparation for diagnostic abdominal procedures like endoscopies.

Belonging to a class of surface-active agents, the active ingredient simethicone acts as a physiological surfactant with anti-foaming properties. It is not absorbed into the bloodstream, passing through the gut unchanged while altering the surface tension of trapped gas bubbles, causing them to coalesce and pass more easily.

Generic Names:

• Simethicone: The universally recognized generic name for this anti-foaming agent.
• Dimethylpolysiloxane: A chemical name frequently used in scientific literature and certain regional markets.

Global Brand Names:

Simethicone is sold under various brand names globally and across Hong Kong.

• Gascon (加斯克兒): The most prominent brand in Hong Kong, commonly available as 40mg or 80mg chewable tablets.
• De-Gas: A high-strength simethicone formulation frequently found in local pharmacies.
• Infacol: A globally recognized liquid formulation primarily used for infant colic, widely accessible in Hong Kong.
• Mylicon: A popular brand available in multiple pediatric formulations, recognized both internationally and locally.

These names all refer to the same medication. It's important to note that while the active ingredient is the same, different countries may have different regulations and available medication formulations.

What is Gascon used for?

Gascon is used to relieve:

• Flatulence and abdominal bloating
• Pressure and discomfort caused by trapped wind
• Post-operative gas pain following abdominal surgery
• Infantile colic (specific pediatric formulations)

How do you use Gascon?

Availability:

• Chewable tablets
• Liquid drops

Dosage Information:

• Adults and Children over 12 years: 40mg to 125mg taken four times daily after meals and at bedtime.
• Children (2–12 years): 40mg three to four times daily.
• Infants (under 2 years): Administered via specialized pediatric drops; closely follow specific product guidelines.

Suitability:

• Adults: Yes
• Elderly: Yes
• Children and Infants: Yes, using appropriate age-specific formulations
• Pregnant or breastfeeding women: Yes, but consult a healthcare provider first

Who cannot take Gascon?

Allergies and unsuitability:

• Rare, but possible allergic reactions to simethicone or formulation excipients.

Conditions where the drug should not be used:

• Known allergy to simethicone
• Suspected intestinal obstruction or perforation

Side effects are exceptionally rare because Gascon is physiologically inert and is not absorbed into the bloodstream. Common, mild reactions may include a slight increase in belching or mild diarrhea as the trapped gas is physically eliminated from the body.

Severe adverse reactions are highly uncommon but can involve allergic responses. Symptoms of a severe allergic reaction include skin rash, itching, swelling of the face or throat, severe dizziness, and difficulty breathing. If any of these severe allergic symptoms appear, the medication must be stopped immediately and medical help should be sought.

• Separate administration from thyroid medications (such as levothyroxine) by at least four hours to avoid reduced efficacy of the thyroid treatment.
• Do not exceed the recommended daily dosage to prevent minor gastrointestinal upset.
• Chew chewable tablets completely before swallowing to maximize surface area contact in the stomach.
• Stop use and check with a doctor if symptoms persist or worsen despite treatment.

Storage information:

• Store in a cool, dry place below 25°C to 30°C.
• Protect from direct sunlight and moisture.
• Do not freeze liquid formulations.
• Keep out of the reach of children.

Handling instructions:

• Chew tablets completely before swallowing; do not swallow whole.
• Use the specific measuring dropper provided with infant formulations to ensure accurate dosing.

Where is Gascon available in Hong Kong?

In Hong Kong, Gascon and similar simethicone products are classified as Over-the-Counter (OTC) medications. This means they can be sold freely without a prescription.

You can purchase these anti-flatulent medicines at general chain drug stores like Mannings and Watsons, registered community pharmacies, and various supermarkets and convenience stores across the city.