Prazosin (Oral Route)

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Side Effects

Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur:

More common
  • Dizziness or lightheadedness, especially when getting up from a lying or sitting position
  • Fainting (sudden)
Less common
  • Loss of bladder control
  • Pounding heartbeat
  • Swelling of the feet or lower legs
Rare
  • Chest pain
  • Painful inappropriate erection of penis (continuing)
  • Shortness of breath

Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

More common
  • Drowsiness
  • Headache
  • Lack of energy
Less common
  • Dryness of the mouth
  • Nervousness
  • Unusual tiredness or weakness
Rare
  • Frequent urge to urinate
  • Nausea

Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.

Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.

Precautions

DR601149

Portions of this document last updated:

Nov. 1, 2009

Source: Drug Information provided by: Micromedex

Copyright © 2009 Thomson Healthcare Inc. All rights reserved. Information is for End User's use only and may not be sold, redistributed or otherwise used for commercial purposes.


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