Petco Text Logo
Petco Pet Logo

My 20lb dog accidentally got a 100lb Heartgard dose. Is he okay?

Updated On September 23rd, 2025

Pet's info: Dog | Pug | Female | spayed | 10 years and 1 month old | 20 lbs

My 20lb pug I I accident Y gave the Heartgard plus 50-100lb dose.

1 Answer

Most Helpful Answer

Image profile

Answered By Daniel Fonza, DVM

Veterinarian

Published on February 16th, 2020

Heartgard is a very safe medication and with the amount Willi ate, he should be fine. In one study, dogs that received 10 times the recommended dose, showed no signs of toxicity. If you begin to see any signs such as vomiting, diarrhea, lethargy, seizures, etc. then bring him in to be seen by a veterinarian as soon as possible. I hope this helps!

Vote icon

1Pet Parents found this answer helpful

image
Have A Vet Question?

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

Sponsored