One Shot. One Full Year of Heartworm Protection.
- Scott Goetgeluck
- 18 hours ago
- 2 min read
Keeping up with monthly heartworm medication can be easy to intend—and easy to forget. ProHeart 12 offers a convenient alternative: one veterinarian-administered injection that provides 12 full months of heartworm disease prevention for eligible dogs.
Heartworm disease is spread by mosquitoes and can become serious and difficult to treat. Year-round prevention is especially important in warm climates, where mosquitoes can be active for much of the year.

What Is ProHeart 12?
ProHeart 12 is an extended-release injection containing moxidectin. After your veterinarian administers it, the medication is released gradually to provide continuous heartworm protection for a full year.
It is FDA-approved for healthy dogs 12 months of age and older. At the time of the injection, it is also approved to treat existing larval and adult hookworm infections.
Why Pet Owners Choose It
For many families, the biggest advantage is simple: no monthly heartworm pill to remember, hide in food, reorder, or worry about missing. One appointment can help keep your dog protected through all four seasons.
In studies submitted for FDA approval, ProHeart 12 was shown to be effective at preventing heartworm disease for one year under study conditions.
ProHeart 12 may be especially appealing for:
Dogs that refuse or spit out oral medications
Busy households that occasionally miss monthly doses
Families who appreciate an annual preventive-care routine
Dogs in mosquito-prone areas
Owners who want reliable, veterinarian-administered protection
Is It Right for Your Dog?
Every dog is different. Before recommending ProHeart 12, our veterinary team will review your dog’s age, health history, current medications, and heartworm-test status to determine whether this option is appropriate. ProHeart 12 is intended for healthy dogs at least 12 months old.
Like any prescription medication, ProHeart 12 has potential risks and should be discussed with your veterinarian. The benefit of an annual injection is that your dog’s prevention plan is professionally administered and stays on schedule without relying on a monthly at-home reminder.
Protection at Home or at Our Office
A once-yearly injection can make heartworm prevention simpler, more dependable, and easier to manage. Whether your dog is most comfortable receiving care at home or visiting us at the office, our veterinary team can discuss whether ProHeart 12 is a good fit for their needs.
Call us today or request an in-home or in-office appointment to discuss year-round heartworm protection for your dog.