> Western Medicines > Dutasteride


Chinese name:

What is Dutasteride for?

Dutasteride belongs to a class of medications called 5-alpha reductase inhibitors. It works by inhibiting a hormone in the body responsible for enlargement of the prostate. It is used for the treatment of benign prostatic hyperplasia, with or without the use of Tamsulosin, under the name of Duodart®.

How to use it?

Dutasteride is taken orally as capsules. The usual dose is 0.5 mg once daily alone, or in combination with Tamsulosin 0.4mg once daily. Swallow the capsules whole. Do not chew, crush or open the capsules.

What are the side effects of Dutasteride?

Common side effects of Dutasteride include impotence, decreased libido, ejaculation disorders, and gynecomastia.

Who should not take Dutasteride?

  • People who are allergic to Dutasteride, other 5 alpha-reductase inhibitors, or any component of the formulation
  • Pregnant Women

Pharmacist Tips:

  • Pregnant women should not touch and handle Dutasteride capsules because it may harm their unborn baby.
  • Do not donate blood during the treatment or for 6 months after discontinuing the treatment.

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


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


Some common medications Dutasteride may interact with:

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

Where to buy Dutasteride in Hong Kong?

In Hong Kong, Dutasteride 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 Dutasteride 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
  • 0.5mg (Capsules)
  • 0.5mg/0.4mg (Capsules)
Drug class
Sub class
5-Alpha Reductase Inhibitors