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Heartworm Prevention


At Plymouth Veterinary Hospital, we offer Proheart 12 injection as a safe alternative for healthy dogs 1 year and older. 

What is ProHeart 12?

ProHeart 12 is the only FDA-approved product that prevents heartworm disease in dogs for 1 full year with just 1 shot given by your veterinarian. At the time of the shot, ProHeart 12 also treats hookworms.* ProHeart 12 is for use in healthy dogs 12 months of age and older.

*ProHeart 12 is indicated for the treatment of existing larval and adult hookworm (Ancylostoma caninum and Uncinaria stenocephala) infections.

Is ProHeart 12 right for my dog?

ProHeart 12 can be used in healthy dogs 12 months of age and older. We can determine if Proheart12 is good for your dog!

How does ProHeart 12 work?

ProHeart 12 provides 1 full year of heartworm disease prevention in just 1 shot. The active ingredient, moxidectin, is contained in slow-dissolving microspheres that are stored in your dog’s fat-storing connective tissue (a.k.a. adipose tissue). The medicine is then released evenly over 1 year, keeping your buddy consistently protected from heartworms. Cool, right?

What is heartworm disease?

Heartworm disease is serious and potentially fatal—and a single bite from an infected mosquito can cause it in your dog. See the basics about heartworm disease, including your dog’s risk and some of the signs and symptoms.

Is ProHeart 12 a vaccine?

No, ProHeart 12 is not a vaccine because it does not stimulate the production of antibodies. ProHeart 12 is an injection of preventative medicine that slowly releases over time in your dog’s body.

Does my dog need a heartworm test before starting ProHeart 12?

It’s important to know if your dog has heartworms before starting a new heartworm product or switching to a different one. Not sure when your dog last had a heartworm test? Check with your veterinarian before giving any heartworm medication—not just when starting a new product or switching.

Credit: Zoetis Website, 2020

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