Doxazosin Dosage

Doxazosin dosage guidelines call for a starting dose of 1 mg a day, regardless of the condition being treated. Then, based on your response to the medication or blood pressure readings, the dosage can be increased slowly. The maximum doxazosin dosage for people with an enlarged prostate is 8 mg a day; for people with hypertension, it is 16 mg a day.

Doxazosin Dosage: An Overview

The dose of doxazosin mesylate (Cardura®) that your healthcare provider recommends will vary, depending on a number of factors, including:
  • Your age
  • The medical condition you are being treated for
  • Other medical conditions you may have
  • Other medications you are currently taking
  • How you respond to doxazosin.

Specific Doxazosin Dosage Information

The following sections provide specific information on dosing with doxazosin, both when starting the drug and for certain conditions.
Doxazosin Dosage to Start
When you first begin taking doxazosin (for either BPH or hypertension), you will need to start at the lowest dose (1 mg daily). If you stop taking doxazosin, even for just a few days, you will need to restart with the lowest dose to prevent side effects. After the first dose, your doxazosin dose may be increased slowly.
Doxazosin Dosage for BPH
For benign prostatic hyperplasia (BPH), the doxazosin dosage may be increased to 2 mg a day if necessary. After that, the dose can be increased to 4 mg a day and then 8 mg a day if needed. There should be at least one to two weeks in between dose increases, and your blood pressure should be checked each time. The maximum dose for BPH is 8 mg, taken once daily.
Doxazosin Dosage for High Blood Pressure
When treating high blood pressure (hypertension), the doxazosin dosage may be increased to 2 mg a day if necessary, based on blood pressure readings taken two to six hours and one day after the first dose. If needed, the dose can continue to be doubled until a maximum of 16 mg a day is reached. The dose should always be increased slowly, and blood pressure readings should be taken each time the dose is increased.
As with any medication, do not adjust your doxazosin dosage unless your healthcare provider specifically instructs you to do so.
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Doxazosin Mesylate

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