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Minipress (Prazosin)

Prescription medicineOnly Available By Prescription

Top Generic choice

Strength Pack Size Qty
Pack Size
Pack Size

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What if I find a lower price with another pharmacy?

We guarantee the lowest price on all of our prescription products. If you find your medications cheaper at any other recognized licensed mail order pharmacy, we will not only match their price, we will beat it by 25% of the difference. It is our 125% price match guarantee!

Example: If you find a product on Canada Drugs Direct for $50.00 and find the same product for $40.00 at another mail order pharmacy, we will provide you with a $12.50 discount, bringing your total to $37.50.

To get the discount please make sure to mention the price match to the customer service team when they call to collect payment for your order. Or call toll free at 1-888-904-8467 to place the order through the phone.

Terms & Conditions of Program

  • Guaranteed lowest price is only valid at the time of sale.
  • We will only match the current advertised price.
  • Products must be identical and in stock at the time of placing an order with a licensed mail order pharmacy. They must be an online Canadian pharmacy with an address in Canada.
  • Products must be authentic in brand and size (same manufacturer, same country of manufacture, same pack size, same strength and same quantity).
  • Products must be new. We cannot match the price of any used, short expiry or expired product.
  • Price match can only be issued over the phone with our customer service team. Please note at this time we cannot offer price matching for the products Ozempic or Saxenda.
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 is prescribed to treat high blood pressure, also called hypertension.

People with high blood pressure are at an increased risk of cardiovascular events. High blood pressure means that the blood is pushing too hard against the blood vessels that carry blood throughout the body. High pressure can cause tears in blood vessels, resulting in organ damage and cardiovascular events like heart attack and stroke.

Minipress is an alpha-blocker. It works by blocking alpha-adrenergic receptors and causing blood vessels to relax. By relaxing blood vessels, Minipress lowers the body's blood pressure.

Fact Table







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


The starting dose is 1 mg by mouth two to three times per day. The dose is increased based on how well the blood pressure is controlled.

The maximum Minipress dose is 20 mg by mouth two to three times per day.


The active ingredient in Minipress is prazosin.


Your doctor might need to lower the dose of prazosin if you take other medications with which it interacts. Some common drug-drug interactions include:

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


If you are taking Minipress, use erectile dysfunction medications with caution. Taken together, they can cause a drop in blood pressure.

Minipress can cause a rapid drop in blood pressure during the first dose. Take the first dose while sitting own and wait at least 90 minutes before activity.

Side Effects

The most common side effects of Minipress are dizziness and drowsiness. However, rarely it can cause other side effects like:

  • 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.

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.

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