Virbagen Omega for Dogs & Cats

Virbagen Omega for Dogs & Cats
10mu Vial (Pack of 2)

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  • 10mu Vial (Pack of 2) £244.99
  • 10mu Vial (Pack of 5) £549.99

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£244.99 to £549.99


Virbagen Omega is a unique product containing a form of feline interferon. This is given by injection to treat certain viral infections and immune problems in both cats and dogs. The mechanism of action is not fully understood, but it has been found in clinical trials to be of benefit in such things as Parvo virus infection in dogs and Feline Leukamia virus infection. The precise treatment schedule has to be followed exactly to get the best results. For further information, see the datasheet below.

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Medication Datasheets

Reviews (5)

Summary of Reviews for Virbagen Omega for Dogs & Cats

Overall 4
Value For Money
Ease Of Use
Absence Of Side Effects
5 out of 5 (100%) customers would recommend this product.
5 stars (2 reviews)
4 stars (2 reviews)
3 stars (1 reviews)
2 stars (0 reviews)
1 stars (0 reviews)

Only verified purchasers of this product can leave a review.

45 Cat with Stomatitis/inflamed gums
Verified Purchase

By on 19 January 2019

My veterinarian in California was willing to try this based on research to treat my 13-yr old cat with stomatitis. So far we have only gone through 1 pack (I ordered the 2-pack). She has shown significant improvement and is eating again. He has kept the remaining pack refrigerated in case future treatment is needed. I feel this has been easier than dental extractions, less painful, and less costly.

Customer recommends this product

45 Cat with FIP
Verified Purchase

By on 22 July 2017

I was using this product to treat a cat with FIP. I believe if fedex hadn't screwed up, and instead delivered it on time, it might have been more effective. It was to be refrigerated and sent overnight and I received it 3 days late and hot. I had to wait for a second batch to be delivered and VioVet was extremely helpful in this matter. So in a disease where every second counts I was behind the curve. It did seem to help halt some of the progression of the symptoms and I would try it again if the need ever arises.

Customer recommends this product

55 Good price for a good product
Verified Purchase

By on 12 April 2016

I bought the whole course (5 packs) for my cat who has Calicivirus - he was vomitting and off his food due to a severely ulcerated mouth - antibiotics only worked temporarily and it was only a matter of time before I had to have him put down. After his first course of 5 injections his mouth is normal and the vomitting has stopped - other reviews I've read say the full course boosts immune system for about 4 years - very happy so far

Customer recommends this product

55 Great!
Verified Purchase

By on 28 July 2015

This is a life saver for cats with FeLV. I have read a lot of research papers that the chances for a cat to get better with Felv even with this medication are very slim, but after 2 courses of injections my cat is back to being energetic and crazy as she used to be. I am yet to give her the third course, but I am very happy with the results already! Thank to Virbac for making this medication, and VioVet for selling it. The delivery is always on time and very quick!

Customer recommends this product

35 Good
Verified Purchase

By on 14 June 2015

Thank you for the good service in Quick delivery you provide.

Customer recommends this product

Q & A

Below are some recent questions we've received regarding Virbagen Omega for Dogs & Cats, including answers from our team.

1 October 2021 at 11:03am

Virbagen Omega for cat

Claire waddington

Hi I wanted to enquire about dosage, my cat is 3.1 kg.

So am i right in thinking 10ml vial would give me approx 3 treatments on the basis of mixing up the vial with a diluent etc?

So to do the 1 inj per day for 5 days, again at 2 weeks then again at 8, how many vials would i need in total & cost? Confused as on the Q&A it mentions a customer needing 3 vials but as they sell in pairs would need 4, at a total cost of £320.00 (price for 2 is £244.99?)

  • VioVet Staff

The dose according to the datasheet for cats is as follows:
reconstituted product should be injected subcutaneously once daily for 5
consecutive days. The dose is 1 MU/kg bodyweight. Three separate 5-day
treatments must be performed at day 0, day 14 and day 60.

Your 3.1kg cat will need 3.1MU per injection and each vial contains 10MU, so yes your cat will need 2 vials per 5 day course. In total for the datasheet course you would need 6 vials.

I recommend discussing the doseage past your vet though, the standard dosing as per the datasheet is not necessarily the most appropriate course for your cat's condition. Your vet can contact Virbac for off license information regarding dosing, for example courses that are oral rather than injectable for stomatitis. They will also need to write you a prescription for this medication.

25 August 2020 at 7:23am

Felv e Anemia Gato com risco de vida


Olá, minha gatinha tem 2 anos e meio, foi diagnosticada com FELV.
Hoje foi também diagnosticada com uma anemia gravíssima.
Amanhã faremos a transfusão de sangue.
Gostaria de saber como o medicamento pode ajuda-la? A curto, médio e longo prazo? Quais os efeitos colaterais? Qual o valor? Fazem entrega em Brasília? Qual a dosagem para ela que está com 3kg e 700 gramas? Esse remédio combate o vírus? Por gentileza, ajudem. Grata

  • VioVet Staff

Virbagen Omega can be used to treat FeLV as it is an anti-viral medication. Your vet will need to provide specific doseages for this product as it needs to be prescribed by them. Unfortunately we cannot dispense this to Brazil as it is a refridgerated medication, we can only deliver this to locations that our couriers can transport to within 24 hours. We use temperature controlled packaging when we ship this product to ensure these temperatures are maintained.
I recommend contact Virbac who manufacture this product direct, they may have a Brazilian branch who can help you further.

25 July 2020 at 1:30pm

Kot nadżerka jamy ustnej

A jaka cena jednego opakowania

Witam czy pomoże w kalciwirozie wirusowe zapalenie jamy ustnej

  • VioVet Staff

Yes this product can help treat viral stomatitis. You will need a written prescription from your vet to purchase this product, I recommend seeking their advice for specific doseages.

Tak, ten produkt może pomóc w leczeniu wirusowego zapalenia jamy ustnej. Aby kupić ten produkt, będziesz potrzebować pisemnej recepty od weterynarza, polecam zasięgnąć porady w sprawie konkretnych dawek.

3 July 2020 at 9:45pm


Bev Simpson

Will this help a cat that has had his teeth out because of stomatitis. His gums still seem sore and he sound snotty . Good appetite , has had antibiotics and Metacam .

  • VioVet Staff

This product helps fight viral infections. Stomatitis can be caused by a virus and the medication is intended for use in patients with this disease. I would advise talking to your vet for specific doseages and recommendations as the best methods to treat for Stomatitis using Virgaben Omega are off license.

1 August 2017 at 10:20pm

Delivery to other countries

Cenk Karaduman

  • VioVet customer since 2017
  • From: İstanbul, Turkey

Are you delivering this product to Germany or Netherlands? Do you ensure the cold chain during delivery of this product?

  • VioVet Staff

Yes we can send this product to Germany and the Netherlands. At checkout there will only be an option for Fedex International Priority delivery. This means the product will leave our warehouse by 3pm and delivered within 24 hours with icepacks included to keep the product cool.

11 February 2016 at 1:01pm

Cat with flu


  • VioVet customer since 2007
  • From: , United Kingdom

My 8 month old maine coon has flu symptoms. He has been treated with interferon at 0.1ml on day 1,4&6 he is 5kgs. He presented with a bacterial infection and at first this responded well to baytril injection he quickly deteriorated when he went on to the tablet form. He has had his antibiotics changed and now the bacterial infection is slowly improving. Is it worth trying interferon again with him after bacterial infection has cleared up and at what dose would we need to use.

  • VioVet Staff

This is difficult to answer by email because there are lots of factors to take into account. Your own vet is in a better position to assess this. However I would say that this interferon product does not always seem to help much in this sort of situation. Microbial culture and sensitivity testing to help with antibiotic choice is an important part of treating the bacterial component and general nursing measures to help with food and fluid intake are also important. I hope things go well.

28 September 2015 at 5:50am

My cat has leukemia an he is two going on three an he is throwing up an what can I do


What should I do

  • VioVet Staff

This has to be a question for your own vet, who can properly assess your cat. The Virbagen product might well help, but I am not in a position to be able to advise you. I hope he does well though.

6 August 2015 at 8:18am

Cost of treatment with this

Dee j

Hi,trying to work out if I can afford to give my cat with wet FIP a chance with this drug, could you give me any idea how much treating a 2kg cat might cost,per treatment or week or month,would be very grateful of any estimate,thank you.

  • VioVet Staff

One 10mu vial contains enough product to treat a 10kg animal. Theoretically this could be 5 treatments for a 2kg cat, but that would mean mixing up the vial with the diluent and then storing the remainder for up to 4 days. Ideally fresh product is mixed up every day, but many vets will use part of a vial and get part or all of a treatment course from 1 vial. The standard treatment course for a cat is one injection per day for 5 days, then a 5 day course repeated again after about 2 weeks, then again at 8 weeks. This means that the cheapest full course for a 2 kg cat would take 3 vials. You have to buy them in pairs and 4 vials would cost about £320. If your vet feels that a fresh vial is needed per day, then that would cost 5 times as much, so you need to check this with your vet.

26 July 2015 at 11:01pm

Feline Leukemia

Luisa Angel

Please I would like to know if the virbac omega will improve the life of a one year old cat that has leukemia? Thank you

  • VioVet Staff

This product is often used for cats like this and the results are variable but there are often signs of improvement with a better quality of life and statistically an increased life expectancy. It is certainly worth trying.

27 May 2015 at 2:57pm

Interferon and low immune system.


Hi there.
My cat has a very low immune system due to his bad health history. In past it started with Calici virus and now it's chronic Pasteurella spp and recent discovery of toxoplasmosis.
We are considering not just treatment with antibiotic but also Virbac interferon treatment.
We were just wondering is there any information about interferon use in those illnesses?
Many thanks

  • VioVet Staff

We have no special information of our own on this sort of thing. Some people have used the product with variable success for all sorts of immune-related problems and infections. You can search online for reports of these and make your own judgments. We are only able to advise on licensed use, which is in the data sheet. Your own vet is best able to assess these other things.

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