Proper Use

Drug information provided by: Merative, Micromedex®

For the regular tablet—To help you remember to take your medicine, try to get into the habit of taking it at the same time each day.

For the extended-release tablet—

  • Take in the morning with breakfast each day.
  • Swallow whole. Do not crush or chew.
  • Your doctor will not prescribe the extended-release tablet form of this medicine for high blood pressure. It can only be used in men for benign enlargement of the prostate.

For patients taking this medicine for high blood pressure :

  • In addition to the use of the medicine your doctor has prescribed, treatment for your high blood pressure may include weight control and care in the types of foods you eat, especially foods high in sodium. Your doctor will tell you which of these are most important for you. You should check with your doctor before changing your diet.
  • Many patients who have high blood pressure will not notice any signs of the problem. In fact, many may feel normal. It is very important that you take your medicine exactly as directed and that you keep your appointments with your doctor even if you feel well.
  • Remember that doxazosin will not cure your high blood pressure but it does help control it. Therefore, you must continue to take it as directed if you expect to lower your blood pressure and keep it down. You may have to take high blood pressure medicine for the rest of your life . If high blood pressure is not treated, it can cause serious problems such as heart failure, blood vessel disease, stroke, or kidney disease.

For patients taking this medicine for benign enlargement of the prostate:

  • Remember that doxazosin will not shrink the size of your prostate but it does help to relieve the symptoms of this condition. You may still need to have surgery later.
  • It may take up to 2 weeks before your symptoms improve.

Dosing

The dose of this medicine will be different for different patients. Follow your doctor's orders or the directions on the label. The following information includes only the average doses of this medicine. If your dose is different, do not change it unless your doctor tells you to do so.

The amount of medicine that you take depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine.

  • For oral dosage form (tablets):
    • For benign enlargement of the prostate:
      • Adults—At first, 1 milligram (mg) once a day, in the morning or in the evening. Your doctor may increase your dose slowly up to 8 mg once a day.
    • For high blood pressure:
      • Adults—1 mg once a day to start. Your doctor may increase your dose slowly to as much as 16 mg once a day.
      • Children—Use and dose must be determined by your doctor.
  • For oral dosage form (extended-release tablets):
    • For benign enlargement of the prostate:
      • Adults—At first, 4 milligram (mg) once a day, in the morning with breakfast. Your doctor may increase your dose slowly up to 8 mg once a day.

Missed Dose

If you miss a dose of this medicine, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not double doses.

Storage

Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Keep from freezing.

Keep out of the reach of children.

Do not keep outdated medicine or medicine no longer needed.

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Portions of this document last updated: Feb. 01, 2024

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