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Prazosin is available as a 1 mg, 2 mg, and 5 mg oral capsule.

Prazosin is an alpha blocker that is used to treat high blood pressure.

Prazosin is an alpha blocker. It lowers blood pressure by relaxing blood vessels. This helps blood flow smoothly through the body.

Prazosin is typically started at 1 mg by mouth 2 to 3 times a day. If needed, your provider will adjust your dose slowly over time. The typical recommended dose ranges from 6 mg to 15 mg daily total, divided into smaller doses and taken throughout the day. The maximum recommended dose is 20 mg daily total.

Prazosin 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 known sensitivity to quinazolines, Prazosin, or any of the inert ingredients.

Common side effects of Prazosin:

• Dizziness
• Headache
• Drowsiness
• Lack of energy
• Weakness
• Pounding heart
• Nausea

Serious side effects are rare with Prazosin. Contact your healthcare provider immediately if you experience any of the following.

• Priapism: painful erection that lasts more than 4 hours

The following medications may interact with Prazosin:

• Phosphodiesterase-5 (PDE-5) inhibitor: Can result in additive blood pressure lowering effects and symptomatic hypotension.

Various FDA-approved generic manufacturers

There are no adequate and well controlled studies which establish the safety of Prazosin in pregnant women. Prazosin should be used during pregnancy only if the potential benefit justifies the potential risk to the mother and fetus.

• Minipress