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Home Knowledge Center Wellness Library prazosin

prazosin

Pronunciation: PRA zoe sin

Brand: Minipress

Minipress

slide 1 of 24, Minipress,

1 mg, capsule, white, imprinted with MINIPRESS, PFIZER 431

Image of Minipress
slide 1 of 24

Minipress

slide 2 of 24, Minipress,

2 mg, capsule, pink/white, imprinted with MINIPRESS, PFIZER 437

Image of Minipress
slide 2 of 24

Minipress

slide 3 of 24, Minipress,

5 mg, capsule, blue/white, imprinted with MINIPRESS, PFIZER 438

Image of Minipress
slide 3 of 24

Prazosin Hydrochloride

slide 4 of 24, Prazosin Hydrochloride,

1 mg, capsule, white, imprinted with TEVA, 4067

Image of Prazosin Hydrochloride
slide 4 of 24

Prazosin Hydrochloride

slide 5 of 24, Prazosin Hydrochloride,

2 mg, capsule, pink, imprinted with TEVA, 4068

Image of Prazosin Hydrochloride
slide 5 of 24

Prazosin Hydrochloride

slide 6 of 24, Prazosin Hydrochloride,

5 mg, capsule, blue, imprinted with TEVA, 4069

Image of Prazosin Hydrochloride
slide 6 of 24

Prazosin Hydrochloride

slide 7 of 24, Prazosin Hydrochloride,

1 mg, capsule, brown/green, imprinted with MYLAN 1101

Image of Prazosin Hydrochloride
slide 7 of 24

Prazosin Hydrochloride

slide 8 of 24, Prazosin Hydrochloride,

2 mg, capsule, brown, imprinted with MYLAN 2302

Image of Prazosin Hydrochloride
slide 8 of 24

Prazosin Hydrochloride

slide 9 of 24, Prazosin Hydrochloride,

5 mg, capsule, blue/brown, imprinted with MYLAN 3205

Image of Prazosin Hydrochloride
slide 9 of 24

Prazosin Hydrochloride

slide 10 of 24, Prazosin Hydrochloride,

1 mg, capsule, brown/green, imprinted with MYLAN 1101

Image of Prazosin Hydrochloride
slide 10 of 24

Prazosin Hydrochloride

slide 11 of 24, Prazosin Hydrochloride,

2 mg, capsule, dark brown/light brown, imprinted with MYLAN 2302

Image of Prazosin Hydrochloride
slide 11 of 24

Prazosin Hydrochloride

slide 12 of 24, Prazosin Hydrochloride,

5 mg, blue/brown, imprinted with MYLAN 3205

Image of Prazosin Hydrochloride
slide 12 of 24

Prazosin Hydrochloride

slide 13 of 24, Prazosin Hydrochloride,

1 mg, capsule, white, imprinted with PFIZER 431, MINIPRESS

Image of Prazosin Hydrochloride
slide 13 of 24

Prazosin Hydrochloride

slide 14 of 24, Prazosin Hydrochloride,

1 mg, white, imprinted with Z 4067

Image of Prazosin Hydrochloride
slide 14 of 24

Prazosin Hydrochloride

slide 15 of 24, Prazosin Hydrochloride,

1 mg, green/orange, imprinted with MYLAN 1101

Image of Prazosin Hydrochloride
slide 15 of 24

Prazosin Hydrochloride

slide 16 of 24, Prazosin Hydrochloride,

2 mg, capsule, pink/white, imprinted with PFIZER 437, MINIPRESS

Image of Prazosin Hydrochloride
slide 16 of 24

Prazosin Hydrochloride

slide 17 of 24, Prazosin Hydrochloride,

2 mg, pink, imprinted with Z 4068

Image of Prazosin Hydrochloride
slide 17 of 24

Prazosin Hydrochloride

slide 18 of 24, Prazosin Hydrochloride,

2 mg, dark brown/light brown, imprinted with MYLAN 2302

Image of Prazosin Hydrochloride
slide 18 of 24

Prazosin Hydrochloride

slide 19 of 24, Prazosin Hydrochloride,

5 mg, capsule, blue/white, imprinted with PFIZER 438, MINIPRESS

Image of Prazosin Hydrochloride
slide 19 of 24

Prazosin Hydrochloride

slide 20 of 24, Prazosin Hydrochloride,

5 mg, blue, imprinted with Z 4069

Image of Prazosin Hydrochloride
slide 20 of 24

Prazosin Hydrochloride

slide 21 of 24, Prazosin Hydrochloride,

5 mg, blue/brown, imprinted with MYLAN 3205

Image of Prazosin Hydrochloride
slide 21 of 24

Prazosin Hydrochloride

slide 22 of 24, Prazosin Hydrochloride,

1 mg, capsule, brown/green, imprinted with 019, novitium

Image of Prazosin Hydrochloride
slide 22 of 24

Prazosin Hydrochloride

slide 23 of 24, Prazosin Hydrochloride,

2 mg, capsule, brown, imprinted with 020, novitium

Image of Prazosin Hydrochloride
slide 23 of 24

Prazosin Hydrochloride

slide 24 of 24, Prazosin Hydrochloride,

5 mg, capsule, blue/brown, imprinted with 021, novitium

Image of Prazosin Hydrochloride
slide 24 of 24
What is the most important information I should know about prazosin?

What is the most important information I should know about prazosin?

Follow all directions on your medicine label and package. Tell each of your healthcare providers about all your medical conditions, allergies, and all medicines you use.

What is prazosin?

What is prazosin?

Prazosin is used to treat hypertension (high blood pressure). Lowering blood pressure may lower your risk of a stroke or heart attack.

Prazosin may also be used for other purposes not listed in this medication guide.

What should I discuss with my healthcare provider before taking prazosin?

What should I discuss with my healthcare provider before taking prazosin?

You should not use prazosin if you are allergic to it.

Tell your doctor if you have ever had:

  • low blood pressure, especially if caused by taking medications.

Prazosin can affect your pupils. If you have cataract surgery, tell your surgeon ahead of time that you use this medicine.

Tell your doctor if you are pregnant or plan to become pregnant. It is not known whether prazosin will harm an unborn baby. However, having high blood pressure during pregnancy may cause complications such as diabetes or eclampsia (dangerously high blood pressure that can lead to medical problems in both mother and baby). The benefit of treating hypertension may outweigh any risks to the baby.

It may not be safe to breastfeed while using this medicine. Ask your doctor about any risk.

Prazosin is not approved for use by anyone younger than 18 years old.

How should I take prazosin?

How should I take prazosin?

Follow all directions on your prescription label and read all medication guides or instruction sheets. Your doctor may occasionally change your dose. Use the medicine exactly as directed.

Prazosin lowers blood pressure and may cause dizziness or fainting, especially when you first start taking it, or whenever your dose is changed. You may feel very dizzy when you first wake up.

Your blood pressure will need to be checked often.

Swallow the capsule whole and do not crush, chew, break, or open it.

Keep using this medicine as directed, even if you feel well. High blood pressure often has no symptoms. You may need to use blood pressure medication for the rest of your life.

Prazosin is only part of a complete treatment program that may also include diet, exercise, weight control, and special medical care. Follow your doctor's instructions very closely.

Some things can cause your blood pressure to get too low. This includes vomiting, diarrhea, or heavy sweating. Call your doctor if you are sick with vomiting or diarrhea.

Store at room temperature away from moisture and heat.

What happens if I miss a dose?

What happens if I miss a dose?

Take the medicine as soon as you can, but skip the missed dose if it is almost time for your next dose. Do not take two doses at one time.

What happens if I overdose?

What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

Overdose symptoms may include extreme drowsiness or underactive reflexes.

What should I avoid while taking prazosin?

What should I avoid while taking prazosin?

Avoid driving or hazardous activity until you know how this medicine will affect you. Your reactions could be impaired.

Avoid getting up too fast from a sitting or lying position, or you may feel dizzy.

Drinking alcohol with this medicine can cause side effects.

What are the possible side effects of prazosin?

What are the possible side effects of prazosin?

Get emergency medical help if you have signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Call your doctor at once if you have:

  • a light-headed feeling, like you might pass out;
  • pounding heartbeats or fluttering in your chest;
  • new or worsening chest pain; or
  • upper stomach pain, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes).

Call your doctor or seek emergency medical attention if your erection is painful or lasts longer than 4 hours. A prolonged erection (priapism) can damage the penis.

Common side effects may include:

  • dizziness, drowsiness;
  • headache;
  • feeling weak or tired; or
  • nausea.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

What other drugs will affect prazosin?

What other drugs will affect prazosin?

Tell your doctor about all your other medicines, especially:

  • propranolol;
  • any other blood pressure medication;
  • a diuretic or "water pill"; or
  • sildenafil (Viagra) and other erectile dysfunction medicines.

This list is not complete. Other drugs may affect prazosin, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible drug interactions are listed here.

Where can I get more information?

Where can I get more information?

Your pharmacist can provide more information about prazosin.

This information does not replace the advice of a doctor. Healthwise, Incorporated, disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. Learn how we develop our content.

Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.

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