Used for: Relief of bloating, Gas in the stomach
Chinese name:

What is Gasteel?

Gasteel is a brand medication that contains Dimethicone, which belongs to a class of medications called antiflatulents. It works by reducing the foaming of the stomach and therefore is used to relieve stomach gas and bloating in adults and children. 

How to use it?

Gasteel is available as tablets. For the relief of bloating, the usual dose is 40-80mg 3 times a day, after and in-between meals.

What are the side effects of Gasteel?

There are no reported common side effects.

Who should not take Gasteel?

  • People who are allergic to Gasteel or its components.

Pharmacist Tips:

  • Do not exceed 240mg in a day. If symptoms do not improve, speak to your doctor or pharmacist as it could be a more serious condition.
  • Gasteel is often given with acid-reducing drugs like antacids for the treatment of Gastroesophageal Reflux Disease (GERD).

Common dosing schedule: 

Take after food or in-between meals.


This schedule is for reference only, adjustments may be made according to individual needs.


Some common medications Gasteel may interact with:

Gasteel has no known significant interactions with common medications.

Where to buy Gasteel in Hong Kong?

In Hong Kong, Gasteel is an over-the-counter medicine and can be purchased without a prescription from any retail outlet in Hong Kong. This includes grocery stores, convenience stores, medicine shops, and pharmacies. It can also be obtained from doctors. To find a pharmacy near you, refer to the list of pharmacies (“Authorized Sellers of Poisons”) from the Hong Kong Department of Health.  

For more information about drug names and ingredients, you can visit Hong Kong’s Drug Office at

Need more information?

For detailed information about the use of Gasteel in children, pregnancy and breastfeeding, and for questions about drug interactions, please check with your pharmacist or doctor.

Disclaimer: our goal is to provide you with the most relevant drug information and common dosage for Hong Kong. This information does not constitute medical advice. For specific treatment recommendations and advice, always discuss with your doctor or pharmacist, and follow the instructions included with your specific medicine.

Available dosage
  • 40mg / 80mg (Tablets)
Drug class
Gastrointestinal Drugs
Sub class
Antiflatulent drug
Generic Names
Other drugs in same class
Used for: Gas in the stomach, Relief of bloating
Chinese name:
Used for: Relief of bloating, Gas in the stomach
Chinese name:
Used for: Relief of bloating, Gas in the stomach
Chinese name: