Enisyl - F is an l-lysine supplement that is designed to help relieve common symptoms of feline herpesvirus type-1 (FHV-1), such as sneezing and chronic conjunctivitis, in cats and kittens. The active ingredient in this product is an amino acid called lysine, which works by reducing the effectiveness of another amino acid known as arginine. FHV-1 requires arginine in order to replicate. Enisyl F for cats helps prevent this from happening, which reduces symptoms and the risk of flare ups. It also decreases viral shedding, which lowers the risk of other cats and kittens becoming infected with the virus.
Vetoquinol Enisyl F is available in forms that are easy to administer. One form is an oral paste that can be pumped directly inside the cat's mouth or placed on the nose or paw to be licked off. This supplement is also available as Enisyl F Lysine Treats that can be given to cats and kittens. These are flavored with tuna for a more palatable taste. There are no known side effects associated with this product, and it is considered safe to use in combination with other forms of treatment for FHV-1.