Petco Text Logo
Petco Pet Logo

My dog threw up after roundworm medicine. Should I redose him?

Updated On September 23rd, 2025

My dog has just been treated for roundworms. They gave him Drontal 136mg. He’s thrown up twice now. Should I give him another dose or will that be okay? His next dose isn’t for another two weeks.

2 Answers

Most Helpful Answer

Image profile

Answered By Destini R. Holloway, DVM

Veterinarian

Published on December 1st, 2019

Poor guy. If he vomited within 1 hr of giving the medication, he likely vomited it back up. However, if you are still unsure and didn't see the pill within the vomit, it is best to wait at least 3 days, give a second dose, then wait 2 weeks and give a 3rd dose just to make sure he gets the medication. Best of luck with your pet moving forward. Take care. : )

Vote icon

1Pet Parents found this answer helpful

Other Answers

  • Image profile

    Answered By Dr. Melanie, BVSc MS

    Veterinarian

    Published on

    I'm wondering how long after he was given it that he threw up. If it was more than two hours, it should be fine. If he vomited within two hours, wait a day or two, then dose him again. Next time, give it to him with food.

    Vote icon

    1Pet Parents found this answer helpful

See More Answers
image
Have A Vet Question?

Book an appointment with the pros – our expert vets are here to help.

Sponsored