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Patient information A-Z


The following are some examples of brand names of alpha-blockers:

  • Doxazosin
  • Prazosin
  • Terazosin

What are alpha-blockers and what do they do?

Alpha-blockers are used to help control high blood pressure (also known as hypertension).

The kidneys have a major influence on blood pressure and it is particularly important to monitor blood pressure in patients who have kidney disease. There are three reasons for this:

  • Many kidney diseases cause high blood pressure – high blood pressure is very common in people with kidney diseases or failing kidneys.
  • High blood pressure can cause further damage or failing kidneys.
  • People with kidney disease and failure are at high risk of developing heart disease and circulation problems.

Why am I prescribed an alpha-blocker?

An alpha blocker has been prescribed for you to help to control your blood pressure and to help prevent further damage to your kidneys which may be caused by high blood pressure.

How do I take my alpha-blocker?

Alpha blockers are taken once or twice a day. Your doctor/ consultant will tell you how often you should take your tablets. There will also be instructions on the label of your medicine.

Do not stop taking your alpha-blocker unless your doctor tells you to.

Do I need to have any tests or be monitored because I am taking an alpha-blocker?

You will need to have your blood pressure monitored frequently by your doctor.

Your doctor will alter the dose(s) of your high blood pressure medicines if your blood pressure is too high or too low.

Are there any side effects?

The main side effects seen with alpha blockers include:

  • Feeling dizzy or faint when you stand up
  • Having strange dreams
  • Having an upset stomach (indigestion, diarrhoea or constipation)

These side effects should be mild but if you have any concerns about these or any other side effects please contact your doctor or specialist nurse for advice.

Are there any problems taking alpha-blockers with any other medications?

Only take tablets prescribed for you by your doctor and check with your pharmacist before taking any new medicines.

Further information

Further information about your tablet can be found in the patient information leaflet found in the tablet/capsule box or on the container.

If you have any other questions about your medication, please contact the medicines helpline on 01223 217502.

We are smoke-free

Smoking is not allowed anywhere on the hospital campus. For advice and support in quitting, contact your GP or the free NHS stop smoking helpline on 0800 169 0 169.

Other formats

Help accessing this information in other formats is available. To find out more about the services we provide, please visit our patient information help page (see link below) or telephone 01223 256998.

Contact us

Cambridge University Hospitals
NHS Foundation Trust
Hills Road, Cambridge

Telephone +44 (0)1223 245151