|Type of medicine||Alpha-blocker|
|Used for||Enlargement of the prostate gland in men
Hypertension (high blood pressure)
Terazosin belongs to a group of medicines known as alpha-blockers. It works by blocking the action of certain nerve impulses. This blocking action is useful in two different medical conditions. It is used to help to control the symptoms of prostate gland enlargement, and it is also reduces blood pressure in hypertension.
The prostate gland commonly becomes larger in older men. Prostate gland enlargement is also called benign prostatic hyperplasia (BPH). It can cause problems with passing urine, such as having to wait before your urine starts to flow, taking longer at the toilet, dribbling, and a feeling that your bladder is not quite empty. Terazosin works by relaxing the muscles around your bladder and prostate so that you can pass urine more easily.
Terazosin works in high blood pressure by relaxing the blood vessels. This allows blood and oxygen to circulate more freely around your body and lowers your blood pressure.
Before taking terazosin
Some medicines are not suitable for people with certain conditions, and sometimes a medicine may only be used if extra care is taken. For these reasons, before you start taking terazosin it is important that your doctor or pharmacist knows:
- If you are pregnant, trying for a baby or breast-feeding.
- If you ever feel dizzy or faint when you stand up, or if you have ever fainted after passing urine.
- If you are are due to have cataract eye surgery.
- If you have ever had an allergic reaction to this or to any other medicine.
- If you are taking any other medicines, including those available to buy without a prescription, herbal and complementary medicines.
How to take terazosin
- Before you start this treatment, read the manufacturer's printed information leaflet from inside your pack. The leaflet will give you more information about the specific brand of terazosin you have been given, and a full list of possible side-effects from taking it. Take terazosin exactly as your doctor has told you.
- When first starting this treatment, your doctor will give you a small dose which may then be increased. This allows your doctor to make sure that you have the dose that helps your condition and avoids any unwanted symptoms.
- Your first dose of terazosin may make you feel faint, so it is important that you take this dose at bedtime. If you feel dizzy or weary, or if you start sweating, remain lying down until these symptoms have gone.
- Take terazosin once each day. After the first dose, try to take each of your doses at the same time of day, preferably in the morning. This will help you to remember to take them.
- You can take terazosin tablets before or after your meals.
- If you forget to take a dose, take it as soon as you remember. If you do not remember until the following day, skip the missed dose - do not take two doses together to make up for a forgotten dose.
Getting the most from your treatment
- Terazosin can cause dizziness, particularly when you first start taking it. Make sure your reactions are normal before you drive or do things which would be dangerous if you were not fully alert.
- You are advised not to drink alcohol while you are on terazosin. Alcohol will increase the side-effects of terazosin such as feeling faint and dizzy.
- Keep your regular appointments with your doctor so your progress can be monitored.
- If you are a smoker, stopping smoking may significantly improve your symptoms. Ask your doctor for advice on quitting.
- If you are having an operation or medical treatment, tell the person carrying out the treatment that you are taking terazosin. This is because your blood pressure may drop suddenly if you have an anaesthetic. If you are having cataract surgery, it is particularly important that you tell your surgeon you are on terazosin. This is because an eye problem known as 'floppy iris syndrome' has developed in some people and your doctor may advise you to stop taking terazosin for a short while.
Can terazosin cause problems?
Along with their useful effects, most medicines can cause unwanted side-effects although not everyone experiences them. These usually improve as your body adjusts to the new medicine, but speak with your doctor or pharmacist if any of the following side-effects continue or become troublesome.
|Common terazosin side-effects - these affect less than 1 in 10 people who take this medicine||What can I do if I experience this?|
|Feeling tired, dizzy, faint, or weak, blurred vision||If any of these happen, do not drive or use tools or machines. Do not drink alcohol|
|Feeling light-headed when getting up from a lying or sitting position||Getting up more slowly may help. If you begin to feel dizzy, lie down so that you do not faint, then sit for a few moments to prevent the dizziness returning|
|Constipation or diarrhoea, feeling sick||Eat a well-balanced diet and avoid spicy foods. Drink plenty of water|
|Headache, palpitations, erectile failure, dry mouth, skin rash, feeling nervous, chest or back pain, breathlessness, blocked nose, nosebleeds||If any of these become troublesome, speak with your doctor|
If you experience any other symptoms which you think may be due to this medicine, discuss them with your doctor or pharmacist.
How to store terazosin
- Keep all medicines out of the reach and sight of children.
- Store in a cool, dry place, away from direct heat and light.
Important information about all medicines
Further reading & references
- British National Formulary; 63rd Edition (Mar 2012) British Medical Association and Royal Pharmaceutical Society of Great Britain, London
- Manufacturer's PIL, Terazosin 1/2/5 mg Tablets; Manufacturer's PIL, Terazosin 1/2/5 mg Tablets, Accord Healthcare Limited, The electronic Medicines Compendium. Dated February 2010.
|Original Author: Helen Allen||Current Version: Helen Allen||Peer Reviewer: Dr Hannah Gronow|
|Last Checked: 18/05/2012||Document ID: 3472 Version: 23||© EMIS|
Disclaimer: This article is for information only and should not be used for the diagnosis or treatment of medical conditions. EMIS has used all reasonable care in compiling the information but make no warranty as to its accuracy. Consult a doctor or other health care professional for diagnosis and treatment of medical conditions. For details see our conditions.