Cardura is a kind of medication called an alpha-adrenergic blocker. This drug works by relaxing the arteries and veins so that blood can pass more easily through them. Cardura can also relax the muscles in the bladder neck and prostate gland so that it is easier to urinate if you have an issue with a condition called enlarged prostate. More information

A doctor will review your order and write you a prescription, if appropriate. This prescription is then forwarded to a pharmacy. The pharmacy will have your medicine delivered to you within one to three working days. Read more about this process here.

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Patient Leaflet(s)

Cardura is a medication used for the treatment of high blood pressure, as well as a condition known as enlarged prostate gland. This medication contains an active ingredient called Doxazosin, which helps to widen the blood vessels and relax the muscles around the prostate gland and the neck of the bladder.  

What is Cardura? 

Cardura is a kind of medication called an alpha-adrenergic blocker. This drug works by relaxing the arteries and veins so that blood can pass more easily through them. Cardura can also relax the muscles in the bladder neck and prostate gland so that it is easier to urinate if you have an issue with a condition called enlarged prostate.  

Cardura can also have a positive impact on reducing blood pressure and cholesterol at the same time. . Cardura comes in the form of a modified release capsule. This means that the active ingredients are absorbed slowly by the body.  

When is Cardura used? 

Cardura can be used both on its own or with other drugs for the treatment of high blood pressure, otherwise known as hypertension. Lowering high blood pressure can help with the prevention of heart attacks, strokes, kidney problems, and other serious conditions. This medication works by relaxing blood vessels so that blood can flow more easily throughout the body.  

Cardura is also used in some cases by men for the treatment of a larger than usual prostate gland, sometimes referred to as BPH. The Cardura doesn’t shrink your prostate, but it works to relax the muscles in various parts of the bladder, so you can more easily pass urine. Cardura can help to assist with issues like weak streams, or the need to urinate urgently during the middle of the night. Cardura belongs to a drug class known as alpha blockers.  

How do you use Cardura? 

Cardura comes in modified release capsule tablet. This means that rather than all of the medication being released at once, you get a small amount of medicine at a time into your blood stream. This ensures that the effects of Cardura can last longer, and have a better impact on your blood pressure.  

Cardura comes with a patient leaflet which you should read fully before you begin taking the medication. It is also important to read the medication leaflet included with Cardura every time that you get a refill from your pharmacist, as various ingredients in a medication can sometimes change, or new studies could be released.  

Cardura should be taken by mouth, and it can be used either with or without food depending on the advice provided by your doctor. Usually, Cardura is taken once per day, and it may cause a sudden drop in your blood pressure at times, which means that you need to be careful that you don’t notice any signs of low blood pressure when you begin using Cardura.  

Most doctors and medical professionals will recommend that you should take your first dose of Cardura at bedtime to reduce your chances of injuries caused by fainting or dizziness when you are up and walking about. Cardura can be started at a very low dose and then gradually increased over time when your doctor sees how well you respond to the medication.  

What dosages are there? 

The dosage of Cardura provided will be based on your response to treatment and medical condition. Usually, you will start on a low dose of Cardura and work your way up. Make sure that you take this medication regularly to ensure that you are getting the most benefit from it. To ensure that you remember to take Cardura correctly, you may need to set an alarm and take it at the same time every day.  

If you stop Cardura and need to start again, you may not start the medication at the same dose that you were using before. Your doctor may once again need to see how you respond to treatment in case your condition has changed. Cardura is a medication that needs to be taken on a long-term basis. You will need to continue taking Cardura even if you begin to feel healthy. Most people who suffer from high blood pressure do not feel unwell at first. 

Usually, most people taking Cardura will see some benefits from the medication within two weeks of using it. You will need to tell your doctor if your condition worsens or doesn’t improve within two weeks, as you may need a higher dose, or you could be in need of a different kind of treatment. Cardura is only one form of medication for BPH or high blood pressure. There are other options that can be suggested.  

What are the side effects Cardura? 

Although Cardura is a well-tolerated medication for most people, it can sometimes cause side effects, as different people respond to medications in different ways. You may only have side effects when you first begin taking Cardura and then stop experiencing those problems once you get used to the medication. On the other hand, you might find that your side effects persist, which means that you need to seek medical advice.  

Cardura can cause drowsiness, lightheadedness, dizziness and unusual feelings of tiredness caused by a sudden drop in your blood pressure. Your doctor or consultant might ask you to take Cardura at bed time so you’re less likely to experience an injury caused by these side effects. You should tell your doctor straight away if you experience any other severe side effects, including: 

  • Shortness of breath; 
  • Fainting; 
  • Weakness; 
  • Swelling in the feet and hands; 
  • Yellowing of the skin or eyes; 
  • Dark urine; 
  • Easy bruising or bleeding; 
  • High temperature; 
  • Sore throat (consistent). 

Get medical attention immediately if you experience severe chest pain when taking Cardura as this could be a sign of a severe heart response. In very rare situations, males taking Cardura could experience a prolonged erection lasting longer than four hours when using this medication. If this happens, seek medical help immediately. 

Severe allergic reactions to Cardura are rare. However, you should get medical help immediately if you experience side effects that include swelling around the tongue, lips, or throat, a rash, or trouble with your breathing.  

When shouldn’t you use Cardura? 

Before you begin using Cardura tell your doctor or consultant if you have any allergies. This includes any allergies that are caused by external substances that are not Cardura. This medication could have inactive ingredients within it that cause allergic reactions. 

Before you use this medication, it is important to answer any questions that your consultant has about your medical history, this is particularly true when it comes to issues with your heart, such as congestive heart failure, heart attacks, or angina. Also make your doctor or consultant aware of any liver disease issues that you or your close family members might have had. 

Remember that this medication can sometimes cause you to feel drowsy or dizzy if you get a sudden drop in your blood pressure when taking it. It is a good idea to avoid any other substances that may also cause a feeling of drowsiness. Older adults are more likely to experience side effects when taking this drug, particularly in regards to dizziness and the side effects caused by low blood pressure.  

If your doctor or consultant things that you are at greater risk of having side effects when using Cardura they may ask you to get regular checkups to ensure that you are responding well to the medication, and don’t need to change to a different drug. Cardura should only be used by pregnant or breastfeeding women when it is clearly needed, and women should discuss their options with their doctor.  

Does Cardura interact with other medications? 

Drug interactions can change how the medications that you take for various conditions work. This could mean that you have a higher risk of falling victim to problems that you are trying to treat with your existing medications. Additionally, drug interactions may also lead to a higher chance of negative side effects.  

It is important to make your consultant aware of any other substances that you are using before you begin taking Cardura. This includes the medications that have been prescribed to you by a doctor, and drugs that are given over the counter, or have herbal contents. This medication should not be taken with other drugs that are intended to lower your blood pressure, as it could lead to a severe drop in blood pressure.  

If you are taking drugs for the treatment of hypertension or erectile dysfunction then there is also a risk that your blood pressure could become too low which increases your chances of dangerous side effects. Cardura could be affected by medications like macrolide antibiotics, which change the way that certain medications are removed from your body. 

Additionally, some products contain ingredients that raise your blood pressure. You should tell a consultant about any products you are using just in case.  

Where can you buy Cardura? 

Following a consultation you will be able to purchase Cardura through one of the partner pharmacies that is working with us.  

Can I get Cardura without a prescription? 

Cardura cannot be purchased without a prescription.  

Sources, online, 2020, “Cardura” [Accessed 15th of January 2020], Available on: 

Mayo Clinic, online, 2020, “Doxazosin (Oral Route)”[Accessed 15th of January 2020], Available on: 

Medline plus, 2020, online, “Doxazosin”  [Accessed 15th of January 2020], Available on: 

Assessed by:

Dr Imran Malik, General practitioner
Registration number: GMC: 4741365

Dr Imran Malik studied undergraduate medicine at King's College University in Central London and clinical studies at the prestigious King's College Hospital. He graduated with a MBBS degree in 2000 and went on to gain postgraduate memberships with the Royal Society of Medicine and also General Practice in 2006.