Key facts about Doxazosin
What dosages is Doxazosin available in?
Doxazosin is available as a 1 mg, 2 mg, 4 mg, and 8 mg oral tablet.
What is Doxazosin used for?
Doxazosin is an alpha antagonist used for enlarged prostate (benign prostatic hyperplasia, BPH) and high blood pressure.
How does Doxazosin work?
Doxazosin is an alpha-1 blocker. In benign prostatic hyperplasia (BPH), it relaxes certain muscles in the prostate and bladder. This relaxation makes it easier for urine to flow, reducing problems with urination. In the treatment of high blood pressure, it relaxes your blood vessels. This relaxation allows blood to flow more smoothly throughout your body, which helps lower your blood pressure.
How do I take Doxazosin?
Doxazosin is typically taken by mouth once a day.
Is it safe for me to take Doxazosin?
Doxazosin is a safe and effective treatment when used for FDA licensed indications. However, like all medications, they may give you unwanted side effects. You should always discuss potential side effects with your physician to ensure the medication is suitable and right for you. You should not use this medication if you have a hypersensitivity to Doxazosin, other quinazolines, or any other ingredient in Doxazosin.
Doxazosin Common Side Effects
Common side effects of Doxazosin include:
- Dizziness
- Fatigue
- Sleepiness
- Low blood pressure
- Shortness of breath
- Dry mouth
- Swelling
Doxazosin Serious Side Effects
Serious side effects are rare with Doxazosin. Contact your healthcare provider immediately if you experience any of the following. Priapism: painful erection lasting more than 4 hours
Effects of other drugs, drug classes and over-the-counter products on Doxazosin
The following medications may interact with Doxazosin:
- Strong cytochrome P450 (CYP) 3A inhibitors may increase exposure to Doxazosin and increased risk of hypotension
- Concomitant administration of Doxazosin with a phosphodiesterase-5 (PDE-5) inhibitor can result in additive blood pressure lowering effects and symptomatic hypotension
Who makes Doxazosin?
Various FDA-approved generic manufacturers
Is Doxazosin safe in pregnancy?
It is not known if Doxazosin will harm your unborn baby. If you become pregnant while receiving Doxazosin, talk to your healthcare provider.













