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Why is my puppy vomiting after taking amoxicillin for a UTI?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Female | unspayed | 36.6 lbs

6 mo old puppy that weighs 36.6 lbs started on amoxicillin 400 mg twice a day for UTI , vomiting all night, more like liquid spit large amounts. Did not give dose today, can take to our vet tomorrow, advice?

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1 Answer

Most Helpful Answer

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Answered By Lauren Kennedy, DVM

Veterinarian

Published on September 4th, 2017

If Bella just started vomiting since starting the Amoxicillin, I would stop giving her the medication and schedule a recheck with your vet. She likely is just sensitive to this medication and will do fine on another one. Try offering her something easily digestible to eat like plain boiled chicken and rice. This may help settle her stomach until you can get to the vet. I hope this helps. Thanks for using Petco Pet Education Center, formerly Petcoach. Best of luck.

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