Prescription onlyLower-cost generic availableClass: Cardiovascular



Prescription onlyLower-cost generic availableClass: Cardiovascular
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Lowers blood pressure and makes it easier to urinate.

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Our bottom line

Prazosin is used mostly to make urination easier for men with an enlarged prostate, but it can cause dizziness.

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  • Can be added to other blood pressure-lowering medicines if you need additional blood pressure control.
  • Makes urination easier in men with an enlarged prostate.
  • Helps people with PTSD get better sleep with fewer, less-intense nightmares.
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  • Not the best medicine to lower blood pressure by itself.
  • Likely to cause orthostatic hypotension. This means dizziness when you change positions (like standing up) because your blood pressure doesn't adjust quickly enough.
  • Not preferred for people 65 years or older.
How it works

Prazosin is a selective alpha blocker. It lowers blood pressure by relaxing blood vessels. It also relaxes the urethra and prostate, which makes it easier to urinate.

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Side effect rates for Minipress (prazosin)

900 From clinical trials of Prazosin / High blood pressure
  • Dizziness
  • Headache
  • Drowsiness
  • Lack of energy
  • Weakness
  • Heart pounding or racing sensation
  • Nausea

Risks and Warnings for Minipress (prazosin)

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    • Higher risk if:
    • Age 65 years or older

    You can feel dizzy or fall from a sudden drop in blood pressure when you change positions, such as going from sitting to standing. This is called orthostatic hypotension. If you're sensitive to low blood pressure, change position slowly until your body is used to the medicine. If symptoms continues for more than a week, dose adjustment or a different medication may be needed.

Common concerns from people taking Minipress (prazosin)

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  • Take with food or at bedtime to avoid side effects.
  • Can cause drowsiness, headache, dizziness, and nausea.