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My dogs are throwing up after dewormer and Bravecto. What to do?

Updated On September 23rd, 2025

Pet's info: Dog | Dachshund | Male | neutered | 10 lbs

My vet gave my dogs bravecto and dewormer now 4 hours later all 3 are throwing up

4 Answers

Most Helpful Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on December 11th, 2018

Poor Gus, Bugzy, and Charlie! You can see some vomiting as a side effect of a deworming treatment. Give them a bland diet of boiled white meat chicken (no bones) and white rice to see if that helps them. Feed it for a couple of days, and then slowly add back in their normal diet. If the vomiting continues on the bland diet, they stop eating, and/or become very lethargic, I would take them into a vet immediately. Best of luck.

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Other Answers

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    Answered By Dr. Melanie, BVSc MS

    Veterinarian

    Published on August 15th, 2016

    Vomiting can be a side effect after giving a worming tablet. Mild vomiting, as well as diarrhea and mild lethargy, may be present for a day or two after worming, and is not something to worry about. If your dog starts vomiting a lot, becomes very lethargic, has severe diarrhea, or the GI signs last longer than 24-48 hours, then he will need to see a vet right away.

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    Answered By Dr. Strydom, DVM

    Veterinarian

    Published on July 19th, 2019

    You should take him to a vet for an evaluation. You administered the Drontal exactly right by giving it with food but some dogs are sensitive to it. Side effects of Drontal are rare but may include vomiting, loss of appetite, or diarrhea. Other more serious side effects may also occur. So, whether this is a reaction to the medication or it just so happened to coincide with another illness I don't know. If he had only vomited once I would not be worried but repeated vomiting is a concern.

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    Answered By Dr. Melanie, BVSc MS

    Veterinarian

    Published on March 17th, 2018

    While a deworming medication can cause a dog to vomit and/or have diarrhea, it sounds like Fluffy's symptoms are more severe than a normal reaction. It could be that he is suffering from an extreme reaction to the medication, or he could have something else wrong with him such as a GI illness. Given that he vomited so many times yesterday and is now having diarrhea, I think having him seen by a vet as soon as possible is best. The vet can diagnose what is causing his vomiting and diarrhea, and can treat him for it. I hope he feels better soon!

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