Prazosin Compounded Oral Liquid for Dogs and Cats
Prazosin Compounded Oral Liquid for Dogs and Cats

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Prazosin Compounded Oral Liquid for Dogs and Cats

Regular price $55.80 Save $-55.80

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This item requires prescription approval. Details

We DO NOT ship Prescriptions to the following states: Idaho, Oklahoma, Arkansas, Louisiana, Mississippi, Alabama, Maryland, Washington DC, Georgia, South Carolina, North Carolina, New Hampshire, Maine, Nevada.
DO NOT place an order if you plan to ship to the states listed, if you do your order will be canceled automatically.


Prazosin is an oral medication prescribed by veterinarians to treat urethral obstructions and hypertension in cats. It can also be used to treat cats with spinal cord injuries and cancers.
Urethral obstructions happen when stones, mucus, or other items create a blockage in the cat’s urethra, and they are unable to urinate. Prazosin is an alpha-1 adrenergic blocker, it acts as a smooth muscle relaxant and can be helpful in relaxing the bladder and reducing spasms which makes it easier for the cat to heal. It can also lower blood pressure by allowing the muscles around some arteries to relax.
Prazosin does not cure the cause of the urinary blockage, therefore along with this treatment a change of diet, and stress management, could be prescribed to help in the long run.
In dogs, Prazosin can be used for treatment of congestive heart failure, and systemic hypertension.
Help treat your pets’ blood pressure or urethral obstructions and give them a healthier and improved quality of life with prazosin. All our medications are made in our state-of-the-art pharmacy lab in Arizona, USA.
Purchasing affordable pet medications online has never been easier! ExpressVet offers the largest selection of pet medications on planet earth. If you can't find it here, let us know and we'll get it for you! Transform your pet's life with the best pet medications available on the market today.
When it comes to something as important as your pets, you want the best medication possible without breaking the bank. When you buy ExpressVet's compounded medications, you get better value and happy pets!


Prazosin compounded oral liquid is given by mouth in liquid form daily with or without food as prescribed by your veterinarian. If your pet vomits after dosing it on an empty stomach, try giving future doses with food.
This medication should be given just as your veterinarian prescribes. It must be measured carefully, and it's best to use the syringe provided to ensure you are able to give the proper dosage required. After dosing your pet, rinse and dry the syringe, and screw the cap tightly onto the bottle.
Prazosin is a prescription medication for treating hypertension and urethral obstructions in cats and dogs. If you have difficulty giving it to your pet, contact your veterinarian for some helpful tips. We recommend washing your hands with soap and water after handling any medication.

Possible Side Effects

Prazosin compounded oral liquid is generally safe, however, the most common side effects can include dizziness, lethargy, vomiting, diarrhea, nausea, or constipation. Fainting can also occur.
Contact your veterinarian immediately if these side effects or allergic reactions continue or become more severe.

Drug & Food Interactions

Drug Interactions: If your pet is on any of the following medications you should use prazosin with caution:

  • Ace Inhibitors: (e.g. enalapril) - When combined may increase the risk for hypotension.
  • Amlodipine - When combined may increase the risk for hypotension.
  • Beta-Blocking Agents: (e.g. propranolol) - May enhance the postural hypotensive effects seen after the first dose of prazosin.
  • Clonidine - When combined may decrease prazosin’s antihypertensive effects.
  • Pentoxifylline - When combined may increase risk for hypotension.
  • Sildenafil: (and other PDE Inhibitors) - When combined may increase risk for hypotension.
  • Telmisartan - When combined may increase the risk for hypotension
  • Vasopressors: (e.g., dopamine, norepinephrine) - Prazosin may reduce dopamine pressor effect when combined with these drugs.
  • Verapamil - May cause synergistic hypotensive effects when used together with prazosin.


Prazosin should not be given to pets that are hypersensitive to it or other quinazolines. It should be used with caution in pets with chronic kidney disease, or hypotensive conditions, and in dogs that are already experiencing hypotension or are in chronic renal failure. Prazosin may cause a drop in blood pressure. It should not be given to animals that are pregnant.


Your veterinarian will likely monitor your pet’s mucous membrane color, blood pressure and if possible, arterial blood pressure and venous PO2. Baseline thoracic radiography if this medication is used to treat cardiac disease.

Active Ingredients



Prazosin compounded oral liquid is given to your pet by mouth with or without food daily. If vomiting occurs when given on an empty stomach, give future doses with food. Exact instructions will be prescribed by your veterinarian.

Storage Instructions

Prazosin compounded oral liquid should be stored at room temperatures from 68° - 77°F with the cap tightly closed, and away from light, moisture, heat, or humidity.


Prazosin compounded oral liquid should be given orally with or without food. It is dosed based on weight and given one to three times daily. The exact prazosin dosage for dogs and cats will be prescribed by your veterinarian.

What if I miss giving my pet a dose? If you miss a dose, give the next dose as soon as possible. If it is almost time for the following dose, then continue with the next scheduled one and skip the missed dose. Do not give a double dose to catch up or make up for a missed dose.


What is Prazosin?

Prazosin is the generic medication for the brand name Minipress. It is a prescription medication used to treat high blood pressure, spasms of the urethra, and heart failure in dogs and cats. It is available in a capsule form or compounded liquid.

What is prazosin for dogs and cats?

Prazosin is used to treat cats with urethral obstructions, spinal cord injuries, and cancers. It is also used to treat hypertension in dogs and cats.

How long does it take for prazosin to work?

Prazosin is given orally to your pet usually at bedtime and a single dose should last for approximately 10 hours. Prazosin is often used short-term for about 5-7 days to help relieve urinary health concerns.

Can prazosin cause constipation in cats?

Some side effects of the treatment can include dizziness or fainting, other side effects to the digestive tract can be constipation, vomiting, or diarrhea.

Is prazosin safe for dogs?

Yes, it is. Prazosin is safe for use in both dogs and cats. This medication can help reduce hypertension, heart failure, and spasms of the urethra. Prazosin helps the muscles and small blood vessels relax.

What is the prazosin dose for dogs?

Prazosin is dosed once to three times daily, the exact dosage for your dog or cat will be prescribed by your veterinarian.

Where to buy prazosin for dogs and cats?

You can buy prazosin for dogs and cats online at ExpressVet Pharmacy. Once ordered your prescription will be conveniently shipped to your home within 1 to 2 business days.

Do I need a prescription for prazosin?

Yes, a prescription is required for prazosin and your veterinarian will be able to provide it for your pet.

What if my pet overdoses?

If you know or suspect that your pet experienced an overdose, call veterinary services immediately or a 24-hour poison consultation center should be contacted. Signs of an overdose can include panting, vomiting, tremors, vocalization, and increased heart rate.

What is compounding?

Compounding is a method of preparing individualized prescription medications by licensed pharmacists. Compounding allows the practitioner, the pharmacist, and the pet owner to collaborate to create custom dosages, flavors, and dosage forms for pets to easily, safely, and effectively take their medication. Often pet owners struggle to give oral tablets which is why ExpressVet offers compounded oral liquids, transdermal gels, capsules, and treats to make taking care of your pet easy.

How do I order a compounded prescription medication for my pet?

  1. Sign in to your existing ExpressVet account, or create a new account.
  2. Select the item or item(s) you are requesting and add to your cart
  3. Add your pet’s information and your vet’s information.
  4. If you are a returning customer, you will see your previous choices available or you can add as new.
  5. Let us know if you want us to request a prescription from your veterinarian, or if you would like to mail in a prescription.
  6. Complete your billing, shipping, and payment information at checkout to complete your order.

Do all compounded medications require a prescription?

Yes, all compounded medications require a prescription. Express Vet Pharmacy is happy to request a prescription order from your veterinarian, but all prescription orders must be accompanied by a patient-specific prescription from a licensed veterinarian before an order can be shipped out.

Where is Express Vet licensed to dispense veterinary prescription medications?

We are licensed in 38 states. Alaska (AK), Arizona (AZ), California (CA), Colorado (CO), Connecticut (CT), Delaware (DE), Florida (FL), Hawaii (HI), Illinois (IL), Iowa (IA), Kansas (KS), Kentucky (KY), Massachusetts (MA) ,Michigan (MI), Minnesota (MN), Missouri (MO), Montana (MT), Nebraska (NE), Nevada (NV), New Jersey (NJ), New Mexico (NM), New York (NY), North Dakota (ND), Ohio (OH), Oregon (OR), Pennsylvania (PA), Rhode Island (RI), South Dakota (SD), Tennessee (TN), Texas (TX), Utah (UT), Vermont (VT), Virginia (VA), Washington (WA), West Virginia (WV), and Wisconsin (WI)

Where does ExpressVet source the ingredients for compounding?

All ingredients for compounding are from FDA registered manufacturers and distributors.

How long does it take to process my prescription after the pharmacy receives it?

Once the pharmacy receives authorization to dispense from your veterinarian, compounded medications are prepared and shipped out within 1 to 2 business days.