Standard Bravecto chewable tablets and topical solutions for dogs do not prevent heartworm disease. Bravecto’s active ingredient, fluralaner, kills fleas and ticks but has no effect on the heartworm parasite itself. If your dog is on Bravecto, you still need a separate heartworm preventative. The one exception is Bravecto Plus for cats, which does include heartworm prevention.
What Bravecto Actually Covers
Bravecto for dogs is FDA-approved to kill adult fleas and to treat and control infestations of black-legged ticks, American dog ticks, brown dog ticks, Asian longhorned ticks, and lone star ticks. That’s it. The original chewable lasts 12 weeks, and a newer one-month formulation is also available. Neither version contains any ingredient that targets heartworm larvae.
The newer injectable form, Bravecto Quantum, extends flea and tick protection for up to 12 months with a single veterinarian-administered injection. Even this long-acting version does not include heartworm prevention in its FDA-approved label.
There is one interesting lab finding worth mentioning: a study published in PMC found that when mosquitoes fed on dogs treated with fluralaner, the mosquitoes had reduced survival and reproductive success. Since mosquitoes transmit heartworm, this could theoretically lower local transmission risk. But this is a secondary laboratory observation, not a labeled use. You cannot rely on Bravecto to protect your dog from heartworm.
The Exception: Bravecto Plus for Cats
Bravecto Plus is a topical solution made specifically for cats that combines fluralaner with moxidectin, a proven heartworm preventative. This formulation is FDA-approved for the prevention of heartworm disease caused by Dirofilaria immitis. It needs to be applied every two months, either year-round or starting before mosquito season and continuing through the cat’s last seasonal exposure.
There is no equivalent “Plus” product for dogs. If you’ve seen Bravecto marketed with heartworm prevention, it was likely the cat formulation or a product available in a different country.
One safety note on Bravecto Plus for cats: the FDA label advises using it with caution in cats already infected with adult heartworms. In safety testing on heartworm-positive cats, three out of 16 treated cats developed serious neurologic signs and had to be euthanized. In two of those cases, heartworms were found in the spinal area. This is a known risk with any heartworm preventative containing certain drug classes when adult worms are already present, which is why testing before starting prevention matters.
Heartworm Products That Work With Bravecto
Because Bravecto for dogs handles only fleas and ticks, most dog owners pair it with a separate heartworm preventative. Common options include:
- Monthly oral tablets: Heartgard Plus, Interceptor Plus, Sentinel Spectrum, and Trifexis are widely prescribed. Some of these also cover intestinal parasites like roundworms and hookworms.
- Monthly topicals: Revolution and Advantage Multi provide heartworm prevention along with some flea or intestinal parasite coverage.
- Long-acting injectables: ProHeart 6 and ProHeart 12 are given by a veterinarian and last 6 or 12 months, respectively. These pair well with Bravecto since both reduce the number of doses you need to remember.
Your choice depends on what other parasites are common in your area and whether you prefer oral, topical, or injectable options. Pairing Bravecto with a heartworm-only or heartworm-plus-intestinal-parasite product gives full-spectrum coverage without doubling up on flea and tick ingredients.
All-in-One Alternatives That Include Heartworm
If managing two separate products feels like too much, several competitors bundle flea, tick, and heartworm prevention into a single dose. Simparica Trio is a monthly chewable for dogs that covers fleas, ticks, heartworm, and some intestinal worms. NexGard Spectra, available in many countries outside the U.S., offers similar combined coverage. These products use a different flea-and-tick ingredient alongside a heartworm preventative in one tablet.
The trade-off is flexibility. With Bravecto plus a separate heartworm product, you can choose exactly the heartworm preventative that fits your dog’s needs and your budget. With an all-in-one, you get convenience but less ability to customize. Both approaches are effective when used consistently.
Why This Confusion Happens
The “is Bravecto for heartworm” question comes up often because pet owners reasonably expect a parasite product to cover all the major threats. Many competing products do bundle heartworm into their formulas, and Bravecto Plus for cats adds to the confusion by sharing the Bravecto name while offering heartworm coverage that the dog products lack. The bottom line is straightforward: if your dog is on any Bravecto product, heartworm prevention requires a separate medication.