Used for: Seasonal allergic rhinitis, Urticaria
Chinese name:

What is Telfast for?

Telfast is a brand product that contains Fexofenadine, which is a type of second generation antihistamine. Second generation antihistamines are typically non-drowsy, therefore a safer choice for people who need to drive or operate machinery. 


It is used to treat allergic conditions like seasonal allergic rhinitis and hives.

How to use it?

Telfast is taken orally either by tablets or oral suspension. Different starting doses are used in different age groups:

For allergic rhinitis 
Children between 2-11 years old: take 30 mg twice daily.
Adults / Children above 11 years: take 120 mg in 2 divided doses, or 180mg once daily.


For allergic conditions
Children between 6 months – 2 years: take 15 mg twice daily
Children between 2-11 years: take 30 mg twice daily
Adults / Children above 11 years: 180mg once daily.

What are the side effects of Telfast?

Common side effects of Telfast include a small degree of drowsiness in some people, headache, nausea, diarrhoea and increased heart rate.

Who should not take Telfast?

  • Anyone who has an allergy to Fexofenadine or any of its components.

Pharmacist Tips:

  • Avoid driving or operating machinery until you know how you respond to Telfast.
  • Take the medication with water and avoid grapefruit juice.
  • Shake the suspension well before use.

Common dosing schedule: 

  • Do not take antacids containing magnesium or aluminium at the same time as Telfast, or at least separate at least 2 hours apart.

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


Some common medications Telfast may interact with:

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

Where to buy Telfast in Hong Kong?

In Hong Kong, Telfast is a pharmacy only medicine and can be purchased without a prescription in a registered pharmacy under the supervision of a pharmacist. 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 Telfast 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
  • 30mg/5ml (Oral Suspension)
  • 120mg / 180mg (Tablets)
Drug class
Sub class
Antihistamines (Second Generation)
Generic Names
Other drugs in same class
Used for: Allergies, Hay fever, Urticaria
Chinese name:
Used for: Urticaria, Allergic conditions, Hay fever
Chinese name: