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Sick cat when antibiotics are finished
An_248035 posted:
Recently we got a kitten. The kitten came with a herpes virus—that's what the vet diagnosed. When the kitten was introduced to our 5-year-old cat, the older cat developed upper respiratory issues. Both were put on antibiotics for parasites and a Lysine gel for the herpes. The older cat's respiratory issues cleared up. When the round of antibiotics was done, the older cat was sick again with the respiratory issues. The kitten started to develop the respiratory issues as well. Both were put on Clavamox. The kitten is fine. But now that they are both off the antibiotics, the older cat is experiencing the respiratory issues again. When she is sick, her meow is raspy and she is lethargic. She also has gingivitis and the vet is wondering is she has an abscessed tooth.
Drew Weigner, DVM, ABVP responded:
As you know, herpes is a virus and so is not susceptible to antibiotics. They are used primarily to treat a secondary bacterial infection and to decrease symptoms. Lysine is an amino acid that may have some anti-herpesviral effect. All this is to say that the virus runs its course and, while most eventually resolve, it can become a recurrent infection in some cats. The other issue is your cat's gingivitis and possible abscessed tooth. Cleaning her teeth and pulling the tooth may help the problem (or may solve it if that's the cause of her symptoms.)

Drew Weigner, DVM, ABVP
The Cat Doctor
Board Certified in Feline Practice


William Draper, DVM, better known as "Dr. Will," is a well-known small animal practitioner in the Atlanta, GA area. He grew up in Inglewood,...More

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