What is a Generic Drug?

A generic drug is a copy of the brand-name drug with the same dosage, safety, strength, quality, consumption method, performance, and intended use. Before generics become available on the market, the generic company must prove it has the same active ingredients as the brand-name drug and works in the same way and in the same amount of time in the body.

The only differences between generics and their brand-name counterparts is that generics are less expensive and may look slightly different (eg. different shape or color), as trademarks laws prevent a generic from looking exactly like the brand-name drug.

Generics are less expensive because generic manufacturers don't have to invest large sums of money to develop a drug. When the brand-name patent expires, generic companies can manufacture a copy of the brand-name and sell it at a substantial discount.

Minipress (Prazosin)


We don't have this brand product yet!

Sign up to get exclusive coupon discounts and be the first to be notified when we have this product available.

Generic Equivalent - Minipress (Prazosin)

Prescription Required


You'll have option to make 4 interest-free payments by credit card once your order is confirmed using Sezzle

  • Product Details


    Minipress is the brand name for the prescription drug prazosin. Prazosin is used to treat high blood pressure. 

    High blood pressure (or hypertension) is a condition where the blood is pushing too forcefully on the walls of the blood vessels. High pressure can lead to small tears in the vessels and damage to the organs. Left untreated, high blood pressure can lead to cardiovascular events like a heart attack or stroke.

    Minipress works by relaxing blood vessels and reducing the pressure on the vessel walls. It belongs to a group of medications called alpha-blockers.

    Fact Table




    US FDA



    Legal status


    Chemical Name


    Elimination half-life

    2–3 hours

    Dosage (Strength)

    1mg, 5mg


    Consult Doctor


    Minipress, Vasoflex

    Protein binding


    PubChem CID






    ATC code






    Routes of administration

    By mouth


    Take Minipress exactly as prescribed by your doctor. The dose should be slowly increased so that the blood pressure does not drop too fast. 

    The starting dose is 1 mg by mouth two or three times per day.

    The maximum Minipress dosage is 20 mg by mouth two or three times per day. Your doctor will slowly increase the dose until you reach the blood pressure goal.


    The active ingredient in Minipress is prazosin.


    Common drug-drug interactions include:

    • ACE inhibitors
    • Angotensin receptor blockers
    • Loop diuretics
    • Phosphodiesterase inhibitors
    • Thiazide diuretics


    When you take Minipress for the first time, take it while sitting down and wait for 90 minutes because it can cause a fast drop in blood pressure. These effects subside after a few doses. The same effect may happen anytime the dosage is increased.

    Do not drink alcohol way taking this medication. 

    Ask your doctor or pharmacist for a full list of precautions.

    Side Effects

    Side effects of Minipress may include:

    • Blurred vision
    • Constipation
    • Depression
    • Diarrhea
    • Dizziness
    • Drowsiness
    • Dry mouth
    • Dyspnea
    • Edema
    • Epistaxis
    • Fatigue
    • Headache
    • Nasal congestion
    • Nausea
    • Nervousness
    • Orthostatic hypotension
    • Palpitations
    • Skin rash
    • Syncope
    • Urinary frequency
    • Vertigo
    • Vomiting
    • Weakness


    1. Minipress [package insert].New York, NY: Pfizer; 2009.

    Frequently Asked Questions about Minipress (Prazosin)

    What is Minipress (Prazosin)?

    Minipress is a prescription medication that contains the active ingredient Prazosin. It belongs to a class of drugs called alpha-blockers and is primarily used to treat high blood pressure (hypertension).

    How does Minipress work to lower blood pressure?

    Minipress works by relaxing and widening blood vessels, which reduces the resistance of blood flow. This relaxation of blood vessels helps lower blood pressure by allowing blood to flow more easily.

    What conditions can Minipress be prescribed for, besides hypertension?

    Minipress can also be prescribed to treat benign prostatic hyperplasia (BPH), a condition in which the prostate gland enlarges, causing urinary symptoms. In some cases, it may be used off-label for post-traumatic stress disorder (PTSD) to help alleviate nightmares and improve sleep.

    What are the common side effects of Minipress?

    Common side effects of Minipress may include dizziness, lightheadedness, headaches, fatigue, and nasal congestion. These side effects are generally mild and may subside over time.

    How should I take Minipress?

    Minipress is usually taken orally as directed by a healthcare provider. It's essential to follow the prescribed dosage and instructions carefully. Your doctor may start with a low dose and gradually increase it as needed.

    Can Minipress cure high blood pressure or BPH?

    Minipress can effectively manage high blood pressure and alleviate symptoms of BPH, but it does not cure these conditions. It helps control symptoms and reduce the risk of complications associated with high blood pressure or BPH.

    Are there any interactions with other medications?

    Minipress may interact with certain medications, so it is crucial to inform your healthcare provider about all the medications, supplements, and herbal products you are taking. This helps prevent potential drug interactions.

    Are there any special considerations for pregnant or breastfeeding individuals?

    Minipress may not be recommended during pregnancy or breastfeeding. If you are pregnant or planning to become pregnant, or if you are breastfeeding, consult with your healthcare provider to discuss the potential risks and benefits.

    What should I do if I miss a dose of Minipress?

    If you miss a dose of Minipress, take it as soon as you remember. However, if it's close to your next scheduled dose, skip the missed dose and continue with your regular dosing schedule. Do not double dose to make up for a missed one.

    How often should I see my healthcare provider while taking Minipress?

    Regular follow-up appointments with your healthcare provider are important while taking Minipress. They will monitor your blood pressure and overall health to ensure that the medication is working effectively and without any complications.

    IMPORTANT NOTE: The above information is intended to increase awareness of health information and does not suggest treatment or diagnosis. This information is not a substitute for individual medical attention and should not be construed to indicate that use of the drug is safe, appropriate, or effective for you. See your health care professional for medical advice and treatment.

    Product Code : 1652

  • Product Reviews


Please wait while the page is loading. Do not hit refresh or the browser back button to avoid any loss of information.

If you have any questions or concerns, please contact our Customer Service team via the chat option on our website or calling us toll free at: 1-800-891-0844