> Western Medicines > Finasteride

What is Finasteride for?

Finasteride belongs to a class of medications called 5 alpha-reductase inhibitors. It helps hair growth in male pattern baldness by lowering the level of a certain hormone. It is also used to treat the signs of an enlarged prostate.

How to use it?

Finasteride can be taken orally as tablets.


For treating hair loss, the usual dosage is 1 mg once daily for at least 3 months.


For relieving the signs of an enlarged prostate, the usual dosage is 5 mg once daily; assess response after 12 weeks to 6 months.

What are the side effects of Finasteride?

Common side effects include dizziness, tiredness and a change in sex ability or interest. If you have a lump in the breast, breast pain or soreness, please inform your doctor as soon as possible.

Who should not take Finasteride?

  • Anyone who has an allergy to Finasteride or any other components of the drug.
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Where to buy Finasteride in Hong Kong?

In Hong Kong, Finasteride 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 Finasteride 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 / 5mg (Tablets)
Drug class
Sub class
5-Alpha Reductase Inhibitors