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Why is my cat sleeping and not eating after an anti-nausea shot?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Female | spayed | 11 years and 10 months old | 11 lbs

My cat had an anti nausea shot and is not eating just sleeping

1 Answer

Most Helpful Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on February 21st, 2017

Lethargy can be a side effect of an anti-nausea injection such as Cerenia, so that could be why Sunshine is just sleeping. I would monitor her for now, and see if she will eat when she wakes up. You can try to tempt her to eat by offering her some boiled white meat chicken (no bones). If she is still refusing to eat in the morning, I would bring her back into the vet.

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