Bravecto Quantum for Dogs: A Once-Yearly Flea and Tick Treatment
Key takeaways:
The FDA approved Bravecto Quantum (fluralaner) for dogs in 2025. This flea and tick preventive medication needs to be given to dogs only once a year.
Bravecto Quantum is available only as an injection at your veterinarian’s office. Your veterinarian will determine the correct dosage for your dog.
Bravecto Quantum’s side effects are similar to other Bravecto medications’. They can include lack of energy, loss of appetite, vomiting, diarrhea, and swelling at the injection site.
Remembering to give your dog their flea and tick preventives every month can be a challenge. You have to mark your dog’s treatment schedule on your calendar and keep the medications on hand.
But now there’s an easier way. In July 2025, the FDA approved a new flea and tick preventive medication for dogs called Bravecto Quantum (fluralaner). This injection protects against fleas and ticks for a whole year.
Read on to learn everything you need to know about this new long-acting flea and tick treatment.
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Bravecto Quantum for dogs at a glance
Common names | Bravecto Quantum (fluralaner) |
What it treats | Fleas and certain ticks |
How it comes (forms) | Injection |
Dose | 0.1 mL per kilogram of a dog’s body weight |
Common side effects | Lack of energy, loss of appetite, vomiting, diarrhea, and swelling at the injection site |
Cost | Likely $350-$400, but ask your veterinarian |
What is Bravecto Quantum for dogs, and what is it used for?
Bravecto Quantum is FDA approved to prevent fleas and certain ticks in dogs who are at least 6 months old. The medication doesn’t prevent all ticks. But it does provide protection against:
Brown dog ticks
Black-legged ticks
American dog ticks
Lone star ticks
Bravecto Quantum is different because it needs to be given to dogs only once a year. Protection lasts 12 months for fleas and most ticks. Bravecto Quantum works only 8 months against lone star ticks.
How does Bravecto Quantum work for dogs?
Bravecto Quantum works to kill fleas and ticks on dogs thanks to its active ingredient, fluralaner. Fluralaner causes parasites’ nervous systems to stop working correctly. As a result, pests die after ingesting the medication.
What is the dosage of Bravecto Quantum for dogs, and how is it given?
The dosage of Bravecto Quantum for your dog depends on their weight. Your veterinarian will determine the best dosage for your dog. But in general, dogs receive 0.1 mL per kilogram of body weight once a year.
This chart gives you an idea of Bravecto Quantum doses for different dogs.
Dog’s weight | Bravecto Quantum dose |
|---|---|
11 lbs | 0.5 mL |
22 lbs | 1 mL |
44 lbs | 2 mL |
66 lbs | 3 mL |
88 lbs | 4 mL |
110 lbs | 5 mL |
132 lbs | 6 mL |
Bravecto Quantum is available only as an injection at your veterinarian’s office.
Other flea and tick options: Many flea- and tick-prevention options are available. Read about all your choices.
Preventing mites: Dogs can get other parasites too, including mites. Read one dog owner’s experience with this preventable pest and how they were treated.
What fleabites look like: If your pet has fleas, you too can get bitten by these pests. Here’s what fleabites look like on humans.
How long does it take Bravecto Quantum to work for dog fleas and ticks?
Bravecto Quantum starts working to kill fleas within 2 days on dogs receiving the injection. It can take 3 to 5 days to protect against and kill ticks. By 6 days after receiving the injection, any fleas and ticks on your dog are killed within 24 hours.
What should you do if your dog misses a dose of Bravecto Quantum?
If you forget to schedule your dog’s yearly Bravecto Quantum injection on time, call your veterinarian. You’ll want your dog to get their flea and tick shot as soon as you realize they missed a dose.
What are common side effects of Bravecto Quantum in dogs?
The most common side effects dogs experience while taking Bravecto Quantum include:
Lethargy
Swelling or a lump at the injection site
What are the most serious risks of Bravecto Quantum for dogs?
Like other Bravecto products, Bravecto Quantum contains an isoxazoline medication. Isoxazoline medications are known to cause serious neurological side effects in some dogs. These can include:
Tremors
Wobbly gait (ataxia)
If your dog shows neurological symptoms after receiving Bravecto Quantum, contact your veterinarian right away. Your dog may need medical attention. They may also need to switch to a different flea and tick preventive.
Some dogs are sensitive to the medication and have an allergic reaction. Allergic reactions to Bravecto Quantum can include anaphylaxis, in which your dog goes into shock. This is an emergency that requires treatment at an animal hospital right away.
Which dogs shouldn’t take Bravecto Quantum?
Bravecto Quantum is not FDA approved or safe for dogs under 6 months old. Bravecto Quantum may not be the best choice for dogs with a history of seizures since the medication can cause seizures.
Does Bravecto Quantum interact with other dog medications?
Bravecto Quantum doesn’t have many known interactions with other dog medications. But you should not give your dog other flea and tick medications while they are on Bravecto Quantum.
Tell your veterinarian about which medications your dog takes before they’re given Bravecto Quantum. Your vet will know if there are interactions to worry about.
The bottom line
Bravecto Quantum (fluralaner) is a new FDA-approved flea and tick medication for dogs. It needs to be given to dogs only once a year as an injection. This makes it easier to remember than monthly preventives. Bravecto Quantum must be given to dogs at a veterinary clinic, since it’s an injection.
Common side effects of Bravecto Quantum in dogs include low energy, lack of appetite, vomiting, diarrhea, and irritation at the injection site. The active ingredient in Bravecto Quantum can cause seizures and other neurological side effects in some dogs. Talk to your dog’s veterinarian to see if this once-yearly flea and tick medication may be right for your pup.
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References
Bravecto. (n.d.). New Bravecto Quantum for dogs. Merck Animal Health.
Fisara, P., et al. (2023). Year-round efficacy of a single treatment of fluralaner injectable suspension (Bravecto Quantum) against repeated infestations with Rhipicephalus sanguineus (sensu lato) and Ctenocephalides felis in dogs. Parasites & Vectors.
Hale, V. (2025). Bravecto Quantum: A paradigm shift in pet care and Merck’s path to dominance. AInvest.
Merck Animal Health. (n.d.). Bravecto Quantum for dogs.
Merck Animal Health. (2025). Bravecto Quantum (fluralaner for extended-release injectable suspension) [package insert].
MSD Animal Health. (n.d.). Bravecto Quantum for dogs.
U.S. Food and Drug Administration. (2023). Fact sheet for pet owners and veterinarians about potential adverse events associated with isoxazoline flea and tick products.
U.S. Food and Drug Administration. (2025). FDA approves first long-acting flea and tick treatment for dogs.
