Petco Text Logo
Petco Pet Logo

Why is my cat agitated with dilated pupils after recent vaccinations?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Male | neutered | 10 months and 4 days old

Hello  Yesterday i took my 10months old cat to the vet to Get (Vaccine Aganist Feline Panleukopenia,Caliciviral&Herpesviral infection) When i got home he was very calm, around 2hours later he suddenly jumped very high like he had been chased, his pupils were very dilated he was wet around his mouth and looked very scared This morning his pupils are still dilated even in very bright light he walks very slowly like he is walking on eggshells and still looks agitated and ready to jump around

1 Answer

Most Helpful Answer

Image profile

Answered By Dr. Rachel

Veterinarian

Published on July 5th, 2017

What Lucifer is experiencing may be symptoms of an allergic reaction. Other medications (such as topical flea/tick treatments) can sometimes cause this type of a reaction as well. Because this behavior is unusual, it would be a good idea to go in for a recheck exam with your veterinarian just to be safe.

Vote icon

1Pet Parents found this answer helpful

image
Have A Vet Question?

Book an appointment with the pros – our expert vets are here to help.

Sponsored