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Cat's fever rose after amoxicillin. Is it drug fever? When to see vet?

Updated on September 23rd, 2025

Pet's info: Cat | American Shorthair | Male | neutered | 10 months and 1 day old | 10.13 lbs

Hello! My cat was just prescribed amoxicillin for a suspected upper respiratory infection. We gave him his first dose about an hour ago and his fever has risen. I fear he has drug fever. Is it ok to wait until the morning to address this?

1 Answer

Most Helpful Answer

Dr. Melanie, BVSc MS

Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on May 2nd, 2017

It depends on how high Al's fever is at the moment. A cat's normal temperature is between 101-102.5F. Take his temperature rectally, and if it's above 103F, he will need to see a vet immediately. Should it be normal or between 102.5-103F, then he can wait until the morning to see the vet.
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