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My cat vomits after praziquantel, but vet says she's fine. Why?

Updated On September 23rd, 2025

Pet's info: Cat | American Shorthair | Female | spayed | 9 years and 6 months old | 8.9 lbs

Gave my two cats praziquantel on Tuesday, one is fine, one vomits after drinking water. I've taken her to the vet ER twice in the last two days, xrays come back fine, labs last night also fine, they've given her shots for dehydration and nausea both visits and she's fine until the next morning. Her pupils and gums are fine. I'm getting concerned as she was perfectly healthy until giving her the dewormer. They are both indoor cats. Please help ! thank you

1 Answer

Most Helpful Answer

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Answered By Destini R. Holloway, DVM

Veterinarian

Published on October 12th, 2019

I am so sorry that your furry friend Ralph is doing so poorly after a dewormer. You would think if this was the cause that she would have recovered by now. If x-rays didn't show a blockage and labwork came back normal, then it sounds like Ralph just needs supportive care. If he is vomiting things back up at home, then the best course of action here is to admit her to the hospital for a few days so that she can get IV fluids and IV medication until he is well enough to be discharged. Some pets just need extra support, especially older, more sensitive pets. If she is still not doing well after 24 hrs of hospitalization, then I would suggest getting an abdominal ultrasound done on her to get a closer look at things. I do hope that Ralph feels better soon! I wish you all the best moving forward. Take care!

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