Sale Add Wish List Quick view Choose Options Enisyl-F Enisyl-F Lysine Supplement Once your cat becomes infected with the feline herpesvirus type 1 (FHV-1), he will be infected for the course of his life. You can, however, give care, treat symptoms, and limit the length of the... MSRP: Was: $39.99 Now: $30.49 - $236.99 Choose Options