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Sildenafil for pets

Buy Sildenafil 25mg, 50mg or 100mg for your pet

Prescription required - send to us by post
Our score 4.7 Excellent 22,387 patient reviews Prescription required - send to us by post
Package size
4 tablets (£14.99)
£14.99 Delivery included
Send us your prescription and we dispatch treatment on the same day.

How it works


Order your treatment

Select the treatment for your pet and place the order.

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Send us the prescription

Then post your original prescription to our UK pharmacy.

No stamp needed

Free delivery

Once our pharmacy receives your prescription, we deliver your treatment the next day.

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Product information

What is Sildenafil used for in the treatment of dogs and cats?

Sildenafil is used to treat certain heart conditions in dogs. Sildenafil works by relaxing the muscles in the blood vessels' walls, allowing for increased blood flow. This can help treat dogs with pulmonary hypertension, a condition in which the blood pressure in the lungs is too high. Sildenafil can also treat cats with cardiomyopathy, a condition which causes the heart muscle to weaken.

According to recent studies, Sildenafil may also be effective in treating megaesophagus in dogs. Megaesophagus is a condition where the oesophagus becomes enlarged and causes difficulty swallowing food. Sildenafil helps by relaxing the muscles of the oesophagal wall, allowing food to pass through more easily.

Always consult with a veterinarian before giving sildenafil to a dog. It is also a prescription-only medicine (POM), so a vet prescription is required to get the treatment.

Is Sildenafil for pets the same as Sildenafil for humans?

Sildenafil is the same drug found in the treatment named Viagra, used to treat erectile dysfunction in humans. The human treatment is also known by its generic name and active ingredient: Sildenafil, the same treatment prescribed by veterinarians to dogs and cats. The dosage will be different for an animal than a human, and treatment should only be given to the animal for the prescribed reason by the vet.

What dosage of Sildenafil should I give my pet?

The dosage of Sildenafil for dogs and cats will vary depending on the pet's weight, condition and other medications they are taking. It is important to follow your vet’s instructions in order to ensure that the correct dosage is administered. The most common dosages for sildenafil range from 25mg-50mg per day, divided into two or three doses.

How do I give Sildenafil to my pet?

Sildenafil should be given to your dog or cat as directed by a veterinarian. The general advice when giving Sildenafil to your pet is to crush the tablets and administer them directly into your pet's mouth or mixed with their food

Are there any potential side effects of Sildenafil for dogs and cats?

Sildenafil can cause side effects in pets such as low appetite, vomiting, and diarrhoea as well as skin flushing in the groin area. If your pet is taking Sildenafil, closely monitor them for any signs of side effects and contact your veterinarian if they occur.

Where can I buy Sildenafil for my dog or cat?

Sildenafil is a prescription medication, so it can only be obtained from a veterinarian when used to treat a pet. Once a prescription has been issued, Sildenafil can be purchased from either the clinic or a pharmacy. Online pharmacies such as HealthExpress accepts vet prescriptions, so you can order your pet's Sildenafil treatment conveniently online at an affordable price.

How do I place an order for Sildenafil for my pet at HealthExpress?

Once you have a prescription from your vet, select the prescribed dosage and quantity and place the order online. You will then need to post your pet's prescription to us. Once we have received your prescription, the details will be checked by our pharmacist, and the treatment will be sent to your chosen address.

Check out our frequently asked questions (FAQs) page if you have additional questions about ordering medicines for your pet(s) online.

What is the cost of Sildenafil for dogs and cats?

The cost of Sildenafil for your pet will depend on the required dose, quantity, and where you buy it from. As Sildenafil is a medicine used to treat humans, you can typically get it for a better price if you buy it from a pharmacy than if you get it from the vet. Online pharmacies advertise their prices, and you typically won't find it cheaper than from an online provider, such as HealthExpress.

Online UK pharmacy since 2002

For 20 years we have offered treatments to over 2.1 million people. More and more our patients asked us to also provide medication for their pets. So here we are: offering our safe, quick and affordable service for your paw-friends too.

22,387 Reviews
14 Jul

Excellent Service


14 Jul

Excellent service thank you

Mrs Stephens

14 Jul

Dead quick delivery at a great price

David Kennedy

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