If you have a prescription, you can get vitamin K for your dog from 1-800-PetMeds, Allivet, and PetSmart. If you don’t have a prescription, you can get it from Amazon, CVS, Walgreens, and Walmart. Keep in mind, it’s best to contact your veterinarian before purchasing and administering vitamin K to your dog.

In This Article

What Does Vitamin K Do for Dogs?

Vitamin K1 is specifically used to treat dogs who have ingested rat poison. Vitamin K2, known as menaquinone or menatetrenone, is believed to promote bone, dental, and heart health for your dog, as well as help with the treatment of certain cancers. However, there isn’t much research to support these claims, and it’s difficult to find vitamin K2 made for dogs. But, because of the two different types, it’s important to check the ingredient list to be sure you are purchasing the type of vitamin K you intend to give your dog.

Where to Get Vitamin K for Your Dog

Since most vitamin K formulated for dogs has a medical purpose, you will likely need a prescription from a veterinarian. There are a few places where you can buy vitamin K without a prescription — such as at Walmart — but you should consult your vet before giving it to your dog. A veterinarian can give you advice about the proper dosage and/or whether it is the right choice as a health supplement. In addition, over-the-counter supplements usually come in very small doses — about 100 micrograms (mcg) per caplet — so, if you have a large dog, it may not be worth it to buy over the counter. If you’re thinking it might be a good idea to have vitamin K on hand in case of emergency, think again. It’s better to head straight to the vet if your dog ingests rat poison. The veterinarian will likely administer a vitamin K injection and follow up with vitamin K supplements.

There are many multivitamins for dogs on the market, some of which contain vitamin K — in small amounts. If you’re looking for vitamin K benefits, a multivitamin may not be enough.

Another thing to consider is that vitamins and supplements are weakly regulated by the Food and Drug Administration. The FDA does not have to approve or inspect supplements before they are sold in the United States. Because of this, you may want to do your own research into the manufacturer.

Below are the places to buy vitamin K for your dog, with or without a prescription.

If You Have a Prescription

1. 1-800-PetMeds

2. Allivet

3. PetSmart

If You Do Not Have a Prescription

4. Amazon

Note: Because there are so many results on Amazon, we narrowed our search to show only products with more than four stars. These are the products you will find:

5. CVS

6. Walgreens

Note: On the Walgreens website, there are a number of vitamin K supplements available. We’ve listed some of the better deals.

7. Walmart

Note: We’ve only listed items distributed by Walmart.

Where You Cannot Buy Vitamin K for Your Dog

Here are a few places that do not sell vitamin K for dogs:

  • Bentley’s Pet Stuff
  • Petco
  • Petsense
  • Pet Supermarket
  • Pet Supplies Plus
  • Pet Valu
  • Pet World
  • Target

In Summary

You should contact your veterinarian before purchasing and administering vitamin K to your dog. The vet will give you a good idea of the dosage amount and when its best to use vitamin K. Vitamin K1 can be used to treat dogs who have ingested rat poisoning, and vitamin K2 is rumored to have general health benefits for dogs. If you have a prescription for vitamin K, you can shop at 1-800-PetMeds, Allivet, and PetSmart. If you don’t have a prescription, you can try Amazon, CVS, Walgreens, and Walmart.