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My dog ate rat poison, no vet open. How much Vitamin K to give?

Updated on September 23rd, 2025

Pet's info: Dog | Cocker Spaniel | Female | spayed | 30 lbs

I live out in the middle of the country and I'm in need of help with my dog it's new year's day no vet is open but my dog got in to a anticoagulant rat poison I was instructed to give her vitamin K but was not told the amount to give I have a bottle of 100mcg vitamin Khow many do I need to give her

1 Answer

Most Helpful Answer

Sara Farmer, DVM

Answered By Sara Farmer, DVM

Veterinarian

Published on January 1st, 2020

Vitamin K1 is usually dosed at 2.5 mg/kg twice daily as an antidote for anticoagulant rodenticide and giving with a fatty meal is recommended. I would definitely check in with the vet who instructed you to give the medication before starting however - that dose works out to 34 mg for a 30 lb dog, and that would be a lot of 100 mcg tablets to give. There is a veterinary version of Vitamin K1 that comes in 25 and 50 mg tablets that would work better. You could consider calling the Pet Poison Helpline to see what they would recommend as well - they might have more information about medications: petpoisonhelpline.com
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