Cardura

By Medically reviewed by hellodoktor

Generic Name: Cardura Brand Name(s): Generics only. No brands available.

Uses

What is Cardura® (doxazosin) used for?

Cardura® is used to treat hypertension (high blood pressure), or to improve urination in men with benign prostatic hyperplasia (enlarged prostate).

Cardura® XL, the extended-release form of this medicine, is used to treat benign prostatic hyperplasia and should not be used to treat hypertension.

How should I take Cardura® (doxazosin)?

Take Cardura® exactly as prescribed by your doctor. Follow all directions on your prescription label. Your doctor may occasionally change your dose. Do not use this medicine in larger or smaller amounts or for longer than recommended.

Cardura® lowers blood pressure and may cause dizziness or fainting, especially when you first start taking it, or when you start taking it again.

You may feel very dizzy when you first wake up. Be careful when standing or sitting up from a lying position.

Call your doctor if you have severe dizziness or feel like you might pass out.

While using Cardura®, your blood pressure or prostate may need to be checked often.

If you stop taking Cardura® for any reason, ask your doctor before you start taking it again. You may need a dose adjustment.

If you are being treated for high blood pressure, keep using this medicine even if you feel well. High blood pressure often has no symptoms. You may need to use blood pressure medicine for the rest of your life.

How do I store Cardura® (doxazosin)?

Cardura® is best stored at room temperature away from direct light and moisture. To prevent drug damage, you should not store Cardura® in the bathroom or the freezer. There may be different brands of Cardura® that may have different storage needs. It is important to always check the product package for instructions on storage, or ask your pharmacist. For safety, you should keep all medicines away from children and pets.

You should not flush Cardura® down the toilet or pour them into a drain unless instructed to do so. It is important to properly discard this product when it is expired or no longer needed. Consult your pharmacist for more details about how to safely discard your product.

Precautions & warnings

What should I know before using Cardura® (doxazosin)?

Before using this drug, tell your doctor if:

  • You are pregnant or breastfeeding. This is because, while you are expecting or feeding a baby, you should only take medicines on the recommendation of a doctor.
  • You are taking any other medicines. This includes any medicines you are taking which are available to buy without a prescription, such as herbal and complementary medicines.
  • You have allergy with any of active or inactive ingredients of Cardura® or other medications.
  • You have any other illnesses, disorders, or medical conditions.

You should not use Cardura® if you are allergic to doxazosin or similar medicines such as alfuzosin (Uroxatral), prazosin (Minipress), silodosin (Rapaflo), tamsulosin (Flomax), or terazosin (Hytrin).

To make sure Cardura® is safe for you, tell your doctor if you have:

  • A blockage in your digestive tract (stomach or intestines)
  • Severe constipation
  • Liver disease
  • Low blood pressure

Cardura® can affect your pupils during cataract surgery. Tell your eye surgeon ahead of time that you are using this medication. Do not stop using Cardura® before surgery unless your surgeon tells you to.

Is it safe during pregnancy or breastfeeding?

There are no adequate studies in women for determining risk when using this medication during pregnancy or while breastfeeding. Please always consult with your doctor to weigh the potential benefits and risks before taking this medication. This medication is pregnancy risk category C, according to the US Food and Drug Administration (FDA).

FDA pregnancy risk category reference below:

  • A=No risk
  • B=No risk in some studies
  • C=There may be some risk
  • D=Positive evidence of risk
  • X=Contraindicated
  • N=Unknown

Side effects

What side effects can occur from Cardura® (doxazosin)?

Get emergency medical help if you have signs of an allergic reaction to Cardura®: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Call your doctor at once if you have:

  • A light-headed feeling, like you might pass out
  • Severe ongoing stomach pain or bloating
  • New or worsening chest pain
  • Trouble breathing
  • A penis erection that is painful or lasts 4 hours or longer

Common side effects may include:

  • Low blood pressure, dizziness
  • Drowsiness
  • Headache
  • Feeling weak or tired

Not everyone experiences these side effects. There may be some side effects not listed above. If you have any concerns about a side-effect, please consult your doctor or pharmacist.

Interactions

What drugs may interact with Cardura® (doxazosin)?

Cardura® may interact with other drugs that you are currently taking, which can change how your drug works or increase your risk for serious side effects. To avoid any potential drug interactions, you should keep a list of all the drugs you are using (including prescription drugs, nonprescription drugs, and herbal products) and share it with your doctor and pharmacist. For your safety, do not start, stop, or change the dosage of any drugs without your doctor’s approval.

Products that may interact with this drug are:

  • An antibiotic
  • An antidepressant
  • Medicine to treat HIV or AIDS
  • Sildenafil (Viagra) or other erectile dysfunction medicines

Does food or alcohol interact with Cardura® (doxazosin)?

Cardura® may interact with food or alcohol by altering the way the drug works or increase the risk for serious side effects. Please discuss with your doctor or pharmacist any potential food or alcohol interactions before using this drug

What health conditions may interact with Cardura® (doxazosin)?

Cardura® may interact with your health condition. This interaction may worsen your health condition or alter the way the drug works. It is important to always let your doctor and pharmacist know all the health conditions you currently have.

Dosage

The information provided is not a substitute for any medical advice. You should ALWAYS consult with your doctor or pharmacist before using Cardura® (doxazosin).

What is the dose of Cardura® (doxazosin) for an adult?

Usual Adult Dose for Hypertension:

Initial dose: 1 mg orally once a day.

Maintenance dose: 1 to 16 mg orally once a day.

Usual Adult Dose for Benign Prostatic Hyperplasia:

Initial dose:

  • Immediate-release: 1 mg orally once a day.
  • Extended-release: 4 mg orally once a day with breakfast

Maintenance dose:

  • Immediate-release: 1 to 8 mg orally once a day.
  • Extended-release: 4 to 8 mg orally once a day with breakfast. Depending on the patient’s symptomatic response and tolerability, the dose may be increased to 8 mg (the maximum recommended dose). The recommended titration interval is 3 to 4 weeks.

If switching from immediate-release to extended-release tablets, therapy should be initiated with the lowest dose (4 mg once daily). Prior to starting therapy with Cardura extended-release tablets, the final evening dose of immediate-release tablets should not be taken. If Cardura extended-release tablets are discontinued for several days, therapy should be restarted using the 4 mg once daily dose.

Usual Geriatric Dose for Hypertension:

Initial dose: 0.5 mg orally once a day.

What is the dose of Cardura® (doxazosin) for a child?

The dosage has not been established in pediatric patients. It may be unsafe for your child. It is always important to fully understand the safety of the drug before using. Please consult with your doctor or pharmacist for more information.

How is Cardura® (doxazosin) available?

Cardura® is available in the following dosage forms and strengths:

  • Tablet 1mg/2mg/4mg/8mg

What should I do in case of an emergency or overdose?

In case of an emergency or an overdose, call your local emergency service or go to your nearest emergency room.

What should I do if I miss a dose?

If you miss a dose of Cardura®, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and take your regular dose as scheduled. Do not take a double dose.

Hello Health Group does not provide medical advice, diagnosis or treatment.

Review Date: August 9, 2017 | Last Modified: September 13, 2019

Sources
You might also like