It is common for kittens to experience increased sleepiness following vaccinations. Since your kitten is still eating well and playing, this is likely a normal reaction to the vaccines.
- Post-vaccination sleepiness is common
- Monitor your kitten's behavior and appetite
- Contact a vet if symptoms worsen or persist
After receiving vaccinations, some kittens may be sleepier than usual as their immune system is working to respond to the vaccine. Since she is eating and playing normally, this mild lethargy might simply be a normal response. However, it’s important to keep an eye on her overall behavior and consult a vet if you have lingering concerns or if symptoms worsen.
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
- How long will my kitten feel sleepy after vaccinations?
Increased sleepiness can last for a day or two post-vaccination as your kitten's body responds. If it lasts longer or you notice other symptoms, consulting with a vet is recommended.
- What are other common side effects of vaccines?
Besides sleepiness, mild fever, reduced activity, and slight swelling at the injection site can occur. Severe reactions are rare but should be addressed by a vet immediately.
- When should I contact a vet after vaccinations?
If your kitten experiences severe lethargy, vomiting, swelling, or any other concerning symptoms, seek veterinary attention to ensure her safety.
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.

