Medicines & Supplements A to Z > Dexamethasone


Last updated on July 3, 2019.

Overview   |   Dosage   |   Side Effects   |   Where To Buy  

GENERIC NAME: Dexamethasone 


COMMON BRANDS IN HONG KONG: Ozurdex, Dexaltin 口炎寧, Dexamet, Maxidex

What is Dexamethasone for?

Dexamethasone belongs to a class of medications called glucocorticoids or steroid hormones. It mainly works by reducing inflammation and has a wide range of uses, including but not limited to: 

  • Suppression of inflammation and allergy 
  • Eye inflammation 
  • Joint inflammation 
  • Treatment of croup
  • Prevention of nausea and vomiting associated with chemotherapy

How to use it?

The adult doses of Dexamethasone for different uses by different routes of administration are listed below: 

For suppression of inflammation and allergy 


0.5-10 mg daily. 

For eye inflammation 

Topically as 0.1% suspension 

Apply 1-2 drops to the affected eye(s) 4-6 times daily. The dose may increase up to every hour in severe cases. 

Topically as 0.05% ointment 

Apply 0.5-1 inch into the affected conjunctival sac(s) up to 4 times daily and reduce to once daily if the conditions improve. 

For joint inflammation 

Topically to the joint(s) 

0.3-3.3 mg. The dose can be repeated every 3-21 days according to your response. The dose given depends on the product used. 

What are the side effects of Dexamethasone?

When Dexamethasone is taken by mouth for long-term use, it can have side effects such as anxiety, cataracts, cognitive impairment, fat redistribution (moon face and buffalo hump), fluid retention, gastrointestinal discomfort, headache, impaired wound healing, high blood pressure, increased risk of infection, menstrual cycle irregularities, and osteoporosis.

Where to buy Dexamethasone in Hong Kong?

In Hong Kong, Dexamethasone 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

For detailed information about the use of Dexamethasone 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.