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Chlorphenamine Maleate

Last updated on June 26, 2019.

Overview   |   Dosage   |   Side Effects   |   Where To Buy  

GENERIC NAMES: Chlorpheniramine Maleate, Chlorphenamine Maleate 


COMMON BRANDS IN HONG KONG: Chlorpheniramine/Chlormine, Horamine, Piriton

What is Chlorphenamine Maleate for?

Chlorphenamine Maleate is a sedating (first generation) antihistamine like Diphenhydramine that can relieve allergy such as hay fever, hives, food allergy, drug reactions, and itchiness associated with chickenpox. It can also be used in combination with other medications like paracetamol to treat common cold.

How to use it?

Chlorphenamine Maleate can be taken by mouth and the dosages for different age groups are listed below. 

Adult / Child 12-17 years  

4 mg every 4-6 hours, up to a maximum of 24 mg daily 


4 mg every 4-6 hours, up to a maximum of 12 mg daily 

Child 1-23 months

1 mg twice daily 

Child 2-5 years  

1 mg every 4-6 hours, up to a maximum of 6 mg daily 

Child 6-11 years  

2 mg every 4-6 hours, up to a maximum of 12 mg daily 

What are the side effects of Chlorphenamine Maleate 

Common side effects of Chlorphenamine Maleate include drowsiness and dizziness, dry mouth, fatigue, headache, nausea, blurred vision, impaired concentration, and abnormal coordination. Avoid driving or operating machinery until you know how you respond to Chlorphenamine Maleate. 

Where to buy Chlorphenamine Maleate in Hong Kong?

In Hong Kong, Chlorphenamine Maleate is an over-the-counter medicine and can be purchased without a prescription from 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

For detailed information about the use of Chlorphenamine Maleate 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.