• Basic Info
• Top Questions
• Clinical Info
• Interactions

What are the possible side effects of prazosin?

• an allergic reaction (difficulty breathing; closing of your throat; swelling of your lips, tongue, or face; or hives);

• an increased heartbeat;

• shortness of breath or chest pain; or

• a rash.

Other, less serious side effects may be more likely to occur. Continue to take prazosin and talk to your doctor if you experience

• vivid dreams;

• dizziness or drowsiness;

• weakness, fatigue, or ill feeling;

• nausea, vomiting, diarrhea, constipation, abdominal pain, or decreased appetite;

• fluid retention or slight weight gain;

• joint or muscle aches;

• headache, irritability, or depression;

• increased urination;

• decreased sex drive; or

• numbness or tingling in your hands, feet, arms, or legs.

Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.

What other drugs will affect prazosin?

Talk to your doctor and pharmacist before taking any prescription or over-the-counter medicines, including herbal supplements, during treatment with prazosin.

Where can I get more information?

Your pharmacist has additional information about prazosin written for health professionals that you may read

What does my medication look like?

Prazosin is available with a prescription under the brand name Minipress. Other brand or generic formulations may also be available. Ask your pharmacist any questions you have about this medication, especially if it is new to you.

• Minipress 1 mg--white capsules

• Minipress 2 mg--pink/white capsules

• Minipress 5 mg--blue/white capsules

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.