> Western Medicines > Codaewon


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What is Codaewon?

Codaewon is a brand medication that contains Chlorphenamine, Dihydrocodeine, Guaifenesin, Methylephedrine, which are the combination of cough medicines, antihistamines and sympathomimetics. It is therefore used in the treatment of productive cough, where there is coughing with phlegm.

How to use it?

Codaewon is available as tablets and syrups. It is best taken with food to reduce gastrointestinal side effects.

For productive cough, 

Tablets: Take 2 tablets three times a day.

Syrups: Take 20mL three times a day.
Children 8-11 years old

Tablets: Take 1 tablet three times a day.

What are the side effects of Codaewon?

Common side effects of Codaewon include drowsiness, dizziness, constipation, stomach discomfort, blurred vision, dry mouth. Prolonged use can cause dependence and possible respiratory depression.

Who should not take Codaewon?

  • People allergic to any component of the formulation
  • People with a history of alcohol or drug dependence
  • Patients with respiratory depression, serious bronchial asthma or gastrointestinal obstruction

Pharmacist Tips:

  • Note that Codaewon contains opioids, which can have the potential to be addictive and you can become tolerant over time.
  • Tell your doctor if you experience severe side effects, such as difficulty breathing.
  • Do not stop the medication abruptly if you have used Codaewon over long periods of time.
  • Eat more high-fibre foods, drink more water and do more exercise to reduce the side effects of constipation.
  • Avoid alcohol while you are taking Codaewon as it can cause extreme drowsiness.

Common dosing schedule: 
Take it three times a day, preferably after food.

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


Some common medications Codaewon may interact with:

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

Where to buy Codaewon in Hong Kong?

In Hong Kong, Codaewon 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 Codaewon 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
  • (Tablets)
  • (Syrup)
Drug class
Antihistamines, Cough and Common Cold Medicines, Sympathomimetics
Sub class
Opioid Analgesics, Alpha Agonists, Expectorants, Antihistamines (First Generation)
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