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Why is my cat sneezing and has a runny nose after his vaccine?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Male | neutered | 7 months and 24 days old

Hello, my cat, Felix, just got his vaccination. It's called Nobivac Trocar Trio. And he's been seenzing and has a runny nose. Other than that, he's active and his appetite is normal.

1 Answer

Most Helpful Answer

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Answered By Jeffrey Milner

Veterinarian

Published on May 25th, 2017

These types of vaccines are not commonly known to cause signs like you have described as an adverse side effect. The most common vaccine reactions are typically localized effects on the injection sites, decreased energy level / lethargy, less commonly some vomiting, and then much more rarely respiratory distress / anaphylactic shock. It possible that Felix could have had a cold before the vaccine was administered, the vaccine weakened the immune system, and you are now seeing the clinical signs. Conversely, this could be something completely new and unrelated. If it is a simple cold or viral type of infection, it will clear up on its own after a few days. If there is a bacterial or fungal component, medication will be needed.

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