Is it normal for a 15-week-old kitten to act weird after getting the FVRCP vaccine with a transdermal application? Should I be more worried?

After my 15-week-old kitten received her FVRCP vaccine yesterday with a transdermal application, she's been acting a bit out of the ordinary. She's usually very playful, but she seems a bit lethargic and not herself since the vaccination. Is it normal to see these kinds of behavior changes with this type of vaccine, or should I be more concerned and consider a follow-up with our vet?

Answer

It is not uncommon for kittens to experience mild side effects after vaccinations. This can include lethargy, but it’s important to monitor her for any worsening symptoms or additional concerns.

  • Monitor her condition for 24–48 hours after the vaccine.
  • Lethargy is a common, mild side effect of vaccinations.
  • Consult your vet if symptoms persist or worsen.

After receiving vaccinations, some kittens may seem lethargic or tired for a day or two, which is generally a normal response as their immune system adjusts. However, if your kitten’s symptoms continue beyond this timeframe, or if she begins to exhibit other signs such as vomiting, swelling at the injection site, or breathing difficulties, it would be wise to consult your vet.

Book a consultation with a licensed vet at Dial A Vet for just $49 AUD if you're unsure or symptoms are getting worse.

Frequently Asked Questions

  • What is the FVRCP vaccine?

    The FVRCP vaccine is a combination vaccine that protects cats against three highly contagious viruses: Feline Viral Rhinotracheitis, Calicivirus, and Panleukopenia.

  • Are side effects normal after a kitten's vaccination?

    Yes, mild side effects like lethargy or a slight fever can be normal as a kitten's immune system responds to the vaccine. These usually resolve within 24–48 hours.

  • When should I contact a vet about my kitten's reaction to a vaccine?

    If your kitten's symptoms persist beyond two days, or if she shows signs of a severe reaction such as difficulty breathing, swelling, or vomiting, you should contact your vet promptly.

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