Generic Name: Doxazosin

  • What is Cardura?

    Cardura is used to treat the symptoms associated with an enlarged prostate gland (benign prostatic hypertrophy). Cardura is also used to treat high blood pressure.

  • What is the most important information I should know about Cardura?

    If you have high blood pressure, you must take Cardura regularly for it to be effective. Since blood pressure declines gradually, it may be several weeks before you get the full benefit of Cardura. You must continue taking Cardura even if you are feeling well. Cardura does not cure blood pressure; it only keeps it under control.

    Cardura can cause a sudden drop in blood pressure after the very first dose. You may feel dizzy, faint, or lightheaded, especially after you stand up from a lying or sitting position. This is more likely to occur after you have taken the first few doses or if you increase your dose, but it may occur at any time while you are taking this medication. It can also occur if you stop taking Cardura and then restart treatment. If you feel very dizzy, faint, or lightheaded, you should contact your doctor.

    Rarely, Cardura causes priapism (a painful, prolonged erection), which can lead to impotence. Notify your doctor immediately if this occurs.

  • Who should not take Cardura?

    Do not use Cardura if you are sensitive to or have ever had an allergic reaction to it or to similar drugs, such as prazosin or terazosin.

  • What should I tell my doctor before I take the first dose of Cardura?

    Tell your doctor about all prescription, over-the-counter, and herbal medications you are taking before beginning treatment with Cardura. Also, talk to your doctor about your complete medical history, especially if you have liver disease or are taking drugs that affect liver function. Prostate cancer may cause the same symptoms as an enlarged prostate gland. Prostate cancer should be ruled out before you start taking this medication. Also, tell your doctor if you are pregnant, plan to become pregnant, or are breastfeeding.

  • What is the usual dosage?

    The information below is based on the dosage guidelines your doctor uses. Depending on your condition and medical history, your doctor may prescribe a different regimen. Do not change the dosage or stop taking your medication without your doctor's approval.

    Your Cardura dosage must be individualized.

    Enlarged Prostate Gland

    Adults: The starting dose is 1 milligram (mg) daily in the morning or at night. Depending on your response, the dose may be increased to 2 mg and then, if needed, to 4 or 8 mg. The maximum recommended dose is 8 mg daily.

    High Blood Pressure

    Adults: The initial dose is 1 mg daily in the morning or at night. Depending on your response, the dose may be increased to 2 mg and then, if needed, to 4 mg, 8 mg, or 16 mg daily.

  • How should I take Cardura?

    This medication can be taken with or without food. Cardura should be taken exactly as prescribed, even if you have no symptoms. Take this medication regularly, otherwise your condition may worsen.

  • What should I avoid while taking Cardura?

    Cardura can cause low blood pressure. You should avoid driving or participating in any hazardous tasks for 24 hours after taking the first dose, after your dose has been increased, or if you stop taking Cardura and then restart the medication.

    Cardura can cause drowsiness. Avoid participating in any activity that requires full mental alertness, such as driving or operating heavy machinery.

  • What are possible food and drug interactions associated with Cardura?

    If Cardura is taken with certain other drugs, the effects of either could be increased, decreased, or altered. Always check with your doctor before combining Cardura with any other prescription or over-the-counter drugs, herbs, or supplements.

  • What are the possible side effects of Cardura?

    Side effects cannot be anticipated. If any develop or change in intensity, tell your doctor as soon as possible. Only your doctor can determine if it is safe for you to continue taking this drug.

    Side effects may include: dizziness, weakness, drowsiness, fatigue, headache, low blood pressure, fluid retention

  • Can I receive Cardura if I am pregnant or breastfeeding?

    The effects of Cardura during pregnancy and breastfeeding are unknown. Talk with your doctor before taking this drug if you are pregnant or plan to become pregnant. Avoid breastfeeding if you are taking Cardura.

  • What should I do if I miss a dose of Cardura?

    Take it as soon as you remember. If it is almost time for your next dose, skip the dose you missed and go back to your regular schedule. Do not take two doses at once.

  • How should I store Cardura?

    Store at room temperature.

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