My kitten just got her distemper vaccine and now she's super sleepy, is this normal or should I be worried?

My kitten received her distemper vaccine earlier today, and since then, she's been unusually sleepy and hasn’t had much energy. I've heard that vaccines can sometimes make pets tired, but is it normal for her to be this lethargic? Should I be monitoring her for any other symptoms, or is this just a temporary reaction that will pass on its own?

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Answer

It is not uncommon for kittens to experience lethargy after receiving vaccines like the distemper vaccine. Typically, this is a temporary reaction that should pass within a day or so.

  • Monitor your kitten for 24–48 hours after vaccination
  • Note any additional symptoms, such as vomiting or swelling
  • Contact a vet if symptoms worsen or if new symptoms appear

Vaccinations can sometimes cause mild side effects as your kitten's immune system responds to the shot. Feeling tired and less energetic is one of the most common reactions and usually resolves quite quickly. However, if your kitten seems unusually lethargic or other concerning symptoms appear, it may be a good idea to have her checked by a vet to rule out any complications.

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 are common side effects of kitten vaccinations?

    Common side effects include mild fever, decreased appetite, and soreness at the injection site. These usually resolve on their own within a couple of days.

  • When should I be concerned about my kitten's reaction to a vaccine?

    If you notice severe symptoms such as persistent vomiting, swelling, difficulty breathing, or if the lethargy lasts longer than 48 hours, contact your veterinarian immediately.

  • Is it safe to vaccinate my kitten again if she's had this reaction?

    Yes, mild reactions are common and not a reason to stop vaccinations. However, discuss any concerns with your vet to ensure your kitten's safety in future visits.

Clinically Approved Standard by Dial A Vet Veterinary Team

Disclaimer: The customer and expert messages presented herein may have been altered with artificial intelligence or modified to enhance readability and safeguard the privacy of individuals. This content is for informational purposes only and is not a substitute for professional veterinary advice, diagnosis, or treatment. If your pet is experiencing a medical emergency, contact your local veterinarian or emergency animal hospital immediately. Talk to a vet now.

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