The Web Health



Generic Name: Prazosin [PRA-zoe-sin]
The Brand Name is Minipress. Minipress
Dosage form: Oral capsule (1 mg; 2 mg; 5 mg)
The class of Drug: Antiadrenergic agents peripherally acting

What is Prazosin?

Prazosin can be used in the treatment of hypertension (high blood pressure). Lowering your blood pressure can reduce your chance of having a heart attack or stroke, as well as a coronary heart attack.Prazosin is also employed for purposes that are not included in the medication guide.

Side effects of Prazosin

Seek medical attention immediately. If you are experiencing symptoms that indicate an allergy, such as asthma, hives, or swelling of your lips, face, and tongue,

Prazosin may cause serious side effects. Consult your doctor immediately. If you suffer from:

  • Feeling lightheaded, similar to feeling like you've passed out.
  • Beats of your heart, or the sound of fluttering your chest
  • New or worsening chest pain
  • Upper stomach nausea, vomiting, the dark color of urine, the stools being lay-colored, and j jaundice (yellowing of the eyes or skin)

Consult your physician or seek medical emergency attention. If your erection hurts or lasts for more than four hours, An extended erection (priapism) may cause damage to the penis.

Common adverse effects of prazosin could include:

  • Dizziness, drowsiness;
  • Headache;
  • Being tired or weak fatigue or weakness
  • Nausea.

This is not a comprehensive list of all the side effects. Others could happen. Consult your physician to seek medical advice on the effects. You can report any adverse reactions to the FDA at 1-800-FDA-1088.


Follow the directions on the medicine label and the package. Inform your health care providers about your medical issues, allergies, and the medicines you are taking.

Before you Take this Drug

It is not recommended to use prazosin when you are allergic to it.

Speak to your doctor if you've ever had:

  • Low blood pressure, particularly if the cause is due to taking medications,

Prazosin can affect your pupils. If you've had cataract surgery, be sure to inform your surgeon before you go to surgery so he can prescribe prazosin.

Consult your physician if you are expecting or plan to be pregnant. It isn't known if prazosin could harm the unborn baby. But having hypertension during pregnancy could result in complications, such as diabetic issues as well as eclampsia (a dangerous hypertension that could cause medical issues in both baby and mother). The benefits of treating hypertension could outweigh any risk for the baby.It is not advised to breastfeed while taking the medication. Consult your physician about any potential risks.

Prazosin has not been approved for use by anyone less than 18 years old.

How to take prazosin?

Refer to the directions on the prescription label, and then read any medication manuals or guidelines. The doctor might alter your dosage. Make sure you take the medicine precisely as directed.

Prazosin reduces blood pressure and could cause dizziness and fainting, particularly when you are first beginning to take it or when the dose is altered. It is possible to feel extremely dizzy the moment you get up.Your blood pressure needs to be monitored regularly.Take the capsule in its entirety and avoid crushing, chewing, breaking, cracking, or even breaking it open.

Use this medication according to the directions, even if you do not feel well. High blood pressure can have no signs. It could be necessary to take blood pressure medications throughout your life.

Prazosin is a small part of a full treatment plan that may comprise exercise, diet, weight loss, and particular medical attention. Follow your doctor's prescriptions carefully.Some factors could cause blood pressure levels to become too low. This could include nausea, diarrhea, or excessive sweating. Consult your physician if you are suffering from vomiting or diarrhea.

Place it in a cool, dry place free of heat and moisture.

Details on Dosage

Usual Adult Dose for Hypertension:

Initial dose: 1 mg taken orally 3 or 2 times per day.
Maintenance dosage 1–20 mg daily, orally in doses divided
Titrate slowly, as measured by the blood pressure response.
The therapeutic dosages typically vary from 6 to 15 mg daily in doses that are divided.
Doses in excess of 20 mg are unlikely to enhance effectiveness; however, certain patients might get benefits from daily doses that range from 20 mg to 40 mg in doses divided.

What Happens If I Miss a Dose?

Do not take the medicine for as long as you can. However, do not take your missed dose if you are close to the time of the next dose. Don't take two doses at once.

What Happens If I Overdose?

For medical emergencies, seek emergency medical attention or contact the Poison Help line at 1-800-222-1222.The signs of an overdose could be characterized by extreme drowsiness or weak reflexes.

What Should be Avoided?

Avoid driving or engaging in hazardous activities until you understand the effects of prazosin on you. Your reaction could be affected.Be careful not to get up too fast from a seated or lying position, as you could get dizzy.

Alcohol consumption with this medicine may cause unwanted side effects.

Interaction with Other Drugs

Inform your doctor about your other medications, particularly:

  • Propranolol;
  • Other blood pressure medications;
  • Diuretic, also known as "water pill";
  • Sildenafil (viagra) and other erectile dysfunction medications.

This list isn't complete. Other drugs can interact with prazosin, such as medications that are prescribed and available over the counter, vitamins, and herbal products. Some interactions with drugs may not be listed here. are listed in this article.



Prescription only

Pregnancy & Lactation

CSA Schedule*

Related Drugs
Related Stories