My kitten threw up after vaccines. Is this normal for kittens?
Updated On September 23rd, 2025
Pet's info: Cat | Domestic Shorthair | Male | unneutered | 2 months and 26 days old
Hello, my kitten vomited 6 hours after recieving 2nd round of vaccines. He seems fine otherwise, aside from a little sleepy. He got his energy back after napping for a few hours, and had a full appetite. Then after he played for a bit he vomited. Other than that, he seems okay but I'm still concerned.
3 Answers
Most Helpful Answer
Published on September 27th, 2020
This can be normal! You can see some vomiting after getting vaccines and given that Faelan only vomited once, I would not be too worried. Plus he sounds like he is otherwise acting normally. I would keep an eye on him and if you see protracted vomiting, diarrhea, signs of an allergic reaction (facial swelling, difficulty breathing, then I would be worried and rush him into an ER vet immediately. I hope this helps!
1Pet Parents found this answer helpful
Related Answers from Veterinarians
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Published on January 18th, 2019
Yes getting 2-3 vaccines at once is very normal for cats (probably 80+% of cat vaccine appointments). If vomiting occurs right after vaccines (within 12 hours) I would be concerned about a vaccine reaction. But if it's further out than that it's almost certainly not related. Diarrhea is not a common vaccine reaction, so overall I'm concerned something different is going on with your kitty. Since he's back to normal now, I don't think you need a vet visit, but if the vomiting or diarrhea start up again, I'd definitely recommend an exam and discussion. I wouldn't worry about vaccinating him next year from this description.
1Pet Parents found this answer helpful
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Published on August 20th, 2017
Hi Amanda! I'm sorry that Mongeau vomited today. You can see vomiting as a side effect of the vaccines, and it's only a concern if it's protracted and continuing vomiting. Given that he only did it once, I wouldn't be too concerned. Keep an eye on it, and try feeding him some boiled white meat chicken (no bones) in small amounts to see if that helps settle his stomach. If he vomits the chicken, then I would be concerned and recommend you take him into a vet right away. You can see if there is an ER vet in your area; If not, there will be a vet on call for emergencies. The information to reach that vet is found on a clinic's answering machine or website. I hope this helps!
1Pet Parents found this answer helpful
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