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Harnal OCAS

Chinese name:

What is Harnal Ocas?

Harnal Ocas is a brand medication that contains Tamsulosin, which belongs to a class of medications known as alpha blockers. It works by relaxing your blood vessels to relax the muscles of your prostate. It is therefore used to treat benign prostatic hyperplasia (BPH).

How to use it?

Harnal Ocas is available as capsules. It can be taken with or without food. Do not open, crush or chew the capsules.

For Benign Prostatic Hyperplasia (BPH),
start with 0.4mg once daily and may increase to 0.4mg twice daily if no benefits are observed after 2-4 weeks. 

What are the side effects of Harnal Ocas?

Common side effects of Harnal Ocas include low blood pressure, dizziness, headache, ejaculation disorder and low leg swelling.

Who should not take Harnal Ocas?

  • People who are allergic to any component of Harnal Ocas.
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Where to buy Harnal Ocas in Hong Kong?

In Hong Kong, Harnal Ocas 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 Harnal OCAS 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
  • 0.2mg / 0.4mg (Tablets)
Drug class
Vasodilators
Sub class
Alpha Blockers
Generic Names
Other drugs in same class
Nicergoline
Used for: Cerebrovascular disease, Dementia, Peripheral circulatory disorders
Chinese name: