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Why is my dog sick after his rabies vaccine? Is it a reaction?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Large (61lb +) | Male | neutered | 7 years and 10 months old | 63 lbs

fabian got his rabies vac + heart worm blood test yesterday. he has had the vac before no reaction. today he has thrown up 5 times orangish bile, shivering, lethargic, and the fur on his back is raised strangely. could this be a reaction to the vac? or could he have caught a bug at the vet? or something more serious? i’m freaking out. tail is still wagging and he met me at the door when i got home from errands but he just seems depressed. went potty normally.

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1 Answer

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Answered By Ana M, DVM

Veterinarian

Published on March 7th, 2019

Thank you for submitting your question regarding Fabian. I recommend that he sees his veterinarian again today. Vomiting can be a side effect of vaccination, but there are other causes as well. Based on his exam findings, his veterinarian will make treatment recommendations. I hope this information helps!

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