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Magnesium Trisilicate

Chinese name:

What is Magnesium Trisilicate for?

It is an antacid that reduces the acidity of gastric content, relieving heartburn caused by Gastroesophageal Reflux Disease (GERD).

How to use it?

Magnesium trisilicate is available in liquid, tablet and chewable tablets for oral use.


Heartburn associated with GERD
Chew 1-2 tablets when needed. Chewing can crush the tablet, accelerating the process of drug reacting with gastric content and giving effect quicker.

What are the side effects of Magnesium Trisilicate?

Common side effects of Magnesium Trisilicate include diarrhea. Choosing the combination products that consists of magnesium salts and aluminium salts can reduce the chance of it. Long term use may lead to nephrolithiasis (kidney stone).

Who should not take Magnesium Trisilicate?

  • People with hypophosphatemia
  • People who are allergic to magnesium trisilicate or any component in the formulation.

Pharmacist Tips:

  • Magnesium Trisilicate is only a symptomatic relief medication for heartburn. If symptoms recur or exacerbate, seek medical attention.
  • If pain radiates to the back, left upper arm or neck, please seek medical attention immediately.
  • Although this medication is not contra-indicated for pregnant women, it is advised to avoid administration of self-purchased drugs.

Common dosing schedule:
Chew 1-2 tablets when needed.


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


Some common medications Magnesium Trisilicate may interact with:

Please notify your doctor or pharmacist if you are taking the above medication, dosage adjustments might be needed.

Where to buy Magnesium Trisilicate in Hong Kong?

In Hong Kong, Magnesium Trisilicate 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 https://www.drugoffice.gov.hk

Need more information?

For detailed information about the use of Magnesium Trisilicate 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.

Brands in Hong Kong
Axcel B-complex
Available dosage
  • 105mg / 200mg / 250mg / 270mg / 450mg / 500mg (Chewable Tablets)
  • 20mg/ml / 24mg/ml / 50mg/ml / 90mg/ml / 100mg/ml (Oral Solution)
  • 100mg / 200mg (Tablets)
Drug class
Acid-Reducing Drugs
Sub class
Alternative Names
Magnesium hydroxide
Other drugs in same class
Sodium Bicarbonate
Used for: Gastroesophageal Reflux Disease (GERD), Dyspepsia / Indigestion, Infantile colic, Urine alkalinization, Metabolic acidosis, Heartburn
Chinese name: