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Dexchlorpheniramine Maleate

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What is Dexchlorpheniramine for?

Dexchlorpheniramine Maleate is a sedating (first generation) antihistamine that can relieve allergic symptoms, such as urticaria, rhinitis, conjunctivitis, and skin disorders in which itch is present. Dexchlorpheniramine Maleate is an ingredient commonly found in combination with other medications to treat coughs and common colds.

How to use it?

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


Children aged 2 to 6 years
Take 0.5 mg every 4 to 6 hours.


Children aged 6 to 12 years
Take 1 mg every 4 to 6 hours.


Children aged 12 years and above, and Adults
Take 2 mg every 4 to 6 hours.


The maximum daily dose is 12 mg.

What are the side effects of Dexchlorpheniramine?

Common side effects of Dexchlorpheniramine Maleate include drowsiness and dizziness, dry mouth, fatigue, headache, nausea, blurred vision, impaired concentration, and abnormal coordination.

Who should not take Dexchlorpheniramine?

  • Anyone who is hypersensitive to Chlorphenamine / Chlorpheniramine / Dexchlorpheniramine.

Pharmacist Tips:

  • Avoid driving or operating machinery until you know how you respond to Dexchlorpheniramine Maleate.
  • Many antihistamines are available in combination products. Pay attention to the active ingredients when you are choosing over-the-counter medicines for self-treatment. Do not overdose.
  • Elderly patients (>65 years old) may be more sensitive to the side effects of Dexchlorpheniramine Maleate.
  • If you have an enlarged prostate, you should speak with your doctor or pharmacist before taking Dexchlorpheniramine Maleate.

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


Take Dexchlorpheniramine Maleate at night if you become drowsy after taking the medication. (Daytime sedation can be relieved by taking non-drowsy antihistamines as alternatives.)


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


Some common medications Dexchlorpheniramine Maleate may interact with:

Dexchlorpheniramine Maleate may interact with a number of other medications, especially other sedating medications.


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

Where to buy Dexchlorpheniramine in Hong Kong?

In Hong Kong, Dexchlorpheniramine is an over-the-counter medicine which 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 Dexchlorpheniramine 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.

Brands in Hong Kong
Available dosage
  • 1mg/5ml / 2mg/5ml / 8mg/5ml (Syrup)
  • 2mg / 6mg (Tablets)
Drug class
Sub class
Antihistamines (First Generation)
Other drugs in same class
Used for: Hay fever, Asthma, Allergic rhinitis
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Used for: Motion sickness, Vertigo, Peripheral circulatory disorders
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Used for: Urticaria, Upper respiratory allergies
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