Feline leukaemia vaccine (inactivated)

This medicine is authorised for use in the European Union.


Leucogen is a veterinary vaccine used in cats from eight weeks of age to protect them against feline leukaemia. Feline leukaemia is an infectious disease of cats which affects the immune system and is caused by the feline leukaemia virus (FeLV). Signs of the disease can include loss of appetite, weight loss, poor fur condition, fever, pale gums and diarrhoea; cats persistently infected with the virus may spread it to other cats. The vaccine is used to prevent the disease signs and persistent viraemia (the presence of FeLV in the blood).

The medicine contains a protein from the outer layer of FeLV.

This EPAR was last updated on 07/10/2021

Authorisation details

Product details
Agency product number
Active substance
purified p45 FeLV-envelope antigen
International non-proprietary name (INN) or common name
Feline leukaemia vaccine (inactivated)
Anatomical therapeutic chemical veterinary (ATCvet) codes
Publication details
Marketing-authorisation holder
Virbac S.A.
Date of issue of marketing authorisation valid throughout the European Union
Contact address

1ère Avenue 2065 M - L.I.D.
06516 Carros Cedex

Product information

07/10/2021 Leucogen - EMEA/V/C/000144 - IG-1409

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Product information documents contain:

You can find product information documents for centrally authorised human medicines on this website. For centrally authorised veterinary medicines authorised or updated from February 2022, see the Veterinary Medicines Information website.

Pharmacotherapeutic group

  • Immunologicals for felidae

  • Inactivated viral vaccines
  • feline leukaemia virus

Therapeutic indication

Active immunisation of cats from eight weeks of age against feline leukaemia for the prevention of persistent viraemia and clinical signs of the related disease.

Assessment history

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