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Why is my kitten vomiting yellow and not eating after dewormer?

Updated On September 23rd, 2025

Pet's info: Cat | Domestic Shorthair | Male | neutered | 2 months and 5 days old | 5.73202 lbs

Hi I took my kitten for the 2nd time to the vet this week and he still won't eat or drink, Dr did not find any infection so what do I do now? His been like this for two days and he vomited twice yellow liquid. The vet just keeps giving him medicine that helps with vomiting, he suspects the revolution dewormer was too strong. ... please help

1 Answer

Most Helpful Answer

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Answered By Ana M, DVM

Veterinarian

Published on November 19th, 2018

Thank you for submitting your question regarding your kitten. If he is not improving, then I recommend that he has a further work up. He should have fecal testing, blood work and x-rays of his abdomen to determine the cause of his vomiting and inappetance. Kittens can react to deworming medication, but it is typically a short lived reaction. It worries me that he is still ill. There is likely another another disease process present. In the meantime, encourage him to drink so that he does not become dehydrated. I hope this information helps!

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