> Western Medicines > Montelukast


Chinese name:

What is Montelukast for?

Montelukast belongs to a class of medications called leukotriene receptor blockers. It blocks the action of leukotrienes and hence reduces swelling and narrowing of the airways. Montelukast can be used to prevent asthma attacks and relieve the symptoms of seasonal allergic rhinitis in patients with asthma like sneezing, runny nose and itchiness.

How to use it?

Montelukast is available in regular tablets (for adults), and in chewable tablets or granules (for children). It can be taken with or without food. The oral granules can be placed directly into your child’s mouth or mixed with a spoonful of cold or room temperature food (only applesauce, carrots, rice, or ice cream should be used), breast milk, or baby formula. They should be taken within 15 minutes of mixing.


The oral dosages for different uses and age groups are listed below:


For prevention of asthma attacks

Adult / child 15-17 years

10 mg once daily in the evening.


Child 6 months – 5 years

4 mg once daily in the evening.


Child 6-14 years

5 mg once daily in the evening.


For relieving the symptoms of allergic rhinitis

Adult / Child 15 years or above

10 mg once daily in the evening.

What are the side effects of Montelukast?

There are few common side effects of Montelukast. Rare side effects include dyspepsia, allergic reactions, and muscle weakness.

Who should not take Montelukast?

  • Anyone who is allergic to Montelukast or any component of the formulation.

Pharmacist Tips:

  • Montelukast should not be used to treat an asthma attack.
  • Continue taking Montelukast to prevent asthma even if you do not have any symptoms.


Common dosing schedule:
Montelukast can be taken with or without food.

Take the drug in the evening for asthma prevention.


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


Some common medications Montelukast may interact with:

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

Where to buy Montelukast in Hong Kong?

In Hong Kong, Montelukast is a prescription only medicine, and requires a prescription from a doctor to be purchased in a pharmacy. 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 Montelukast 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
Available dosage
  • 4mg / 5mg (Chewable Tablets)
  • 4mg (Granules)
  • 10mg (Tablets)
Drug class
Sub class
Leukotriene Receptor Antagonists
Other drugs in same class