What is Cardura?

Cardura is a brand medication that contains Doxazosin, which belongs to a class of medications known as alpha blockers. It works by relaxing your blood vessels in the body and relaxing the muscles of your prostate. It is therefore used to treat high blood pressure and benign prostatic hyperplasia (BPH).

How to use it?

Cardura is available as controlled-release tablets. It may be taken with or without food. Do not break or chew tablets.


For high blood pressure and benign prostatic hyperplasia, start with 4 mg once daily, the dose can be adjusted after 4 weeks, then increase if necessary to 8 mg once daily.

What are the side effects of Cardura?

Common side effects of Cardura include low blood pressure, dizziness, headache, and low leg swelling.

Who should not take Cardura?

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

In Hong Kong, Cardura 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 Cardura 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
  • 4mg / 8mg (Controlled-Release Tablets)
  • 1mg / 2mg / 4mg (Tablets)
Drug class
Vasodilators, Antihypertensives
Sub class
Alpha Blockers
Generic Names
Other drugs in same class
Used for: Cerebrovascular disease, Dementia, Peripheral circulatory disorders
Chinese name: