Bravecto Quantum for Dogs: Uses, Side Effects, and Safety

Molly Price, DVM
By Molly Price, DVM. Medically reviewed by

Carina Fung, PharmD, MBA, BCPPS

Published Apr. 16, 2026
Bravecto Quantum, dog at the vet

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In This Article

Overview

PetMD’s medications content is written and reviewed by veterinary professionals to answer common questions about how medications work, their side effects, and what species they are prescribed for. This content should not replace advice from your veterinarian. 

Key Takeaways

  • Bravecto Quantum for dogs is an FDA-approved injectable flea and tick preventative.
  • One veterinary-administered injection provides up to 12 months of protection.
  • It contains fluralaner, a medication that kills fleas and ticks by targeting their nervous system.
  • It must be administered by a veterinarian and is not available as a take-home medication.
  • Bravecto Quantum should be used with caution in dogs with a history of seizures or neurologic disorders.

What Is Bravecto Quantum Used for in Dogs?

​​Bravecto Quantum​ is a​n ​extended-release injection given by your veterinarian that provides year-round flea and tick protection in dogs ​6 ​months of age and older.  

​​​Is Bravecto Quantum FDA-Approved for Dogs? 

Yes, ​Bravecto Quantum is​​ FDA-approved​ for the treatment and prevention of fleas and for the treatment and control of ​several tick species—including ​black-legged ticks, American dog ticks, brown dog ticks, Asian longhorn ticks, and Gulf Coast ticks​—​for 12 months in dogs and puppies 6 months of age and older. 

​​It’s​ also FDA​-​approved ​to treat and​ control Lone Star ticks for ​up to eight​ months in dogs and puppies 6 months of age and older. 

Bravecto Quantum ​​Considerations for Dogs?

​​​Bravecto Quantum may not be appropriate for all dogs. ​​     ​​​​​​ 

  • ​​​Use with caution in dogs with a history of seizures or neurologic disorders.​​ 

  • ​​​Do not use in puppies younger than 6 months of age.​​ 

  • ​​​It is not recommend in breeding, pregnant, or lactating dogs.​​ 

How Does Bravecto Quantum Work in Dogs?

The active ingredient in Bravecto Quantum is flur​​a​​laner, which belongs to a class of flea and tick preventative medications called isoxazolines. Isoxazolines kill fleas and ticks by overstimulating their nervous system, causing paralysis and death. 

How Do You Give Bravecto Quantum to Dogs?

​​Your​ veterinarian will administer Bravecto Quantum as a subcutaneous (under the skin) injection once every 12 months. 

What Happens If You Miss a Dose of Bravecto Quantum? 

​​Because Bravecto Quantum is given by your veterinarian as an injection, missed doses are uncommon. If your dog is overdue for their next scheduled dose, contact your veterinarian to schedule an appointment as soon as possible.​​​​​ 

What Are the Side Effects of Bravecto Quantum in Dogs?

​​Bravecto Quantum is well tolerated in most dogs.​ ​​​​Uncommon side effects may include: 

  • Elevated liver levels 

​​Neurologic side effects ​​ are associated ​​​with​ medications in this class of drugs.​ ​​​​​Tell your veterinarian if your dog has a history of seizures or other neurologic disease.​ ​ 

Neurologic side effects may include: 

Human Side Effects 

​​​​Bravecto Quantum is not for use in humans. ​D​o not ​handle or attempt to assist during injection. Your veterinarian and their staff will safely administer the medication.​​     ​​​​ 

​​If accidental exposure occurs:​ 

  • ​​​Accidental injection:​ ​S​eek medical attention immediately ​and bring the​ ​product label or packaging​, if available.​​​​​     ​​ 

  • ​​​A​​ccidental skin contact​​:​ ​W​ash the ​area​ with water for at least 15 minutes. If redness and swelling occur, seek ​immediate ​medical attention ​and bring the product​ label​ if possible.​​​​​​     

  • ​​​A​​ccidental eye exposure​​:​ ​W​ash the eyes with water for at least 15 minutes. ​​Remove contact lenses if present, then continue rinsing​. If redness and swelling occur, seek ​immediate ​medical attention​.​​​ 

  • ​​​A​​ccidental​​ ingest​​​ion​:​ ​S​eek medical attention or call ​Poison Control​ at ​800-222-1222​.​ 

Monitoring Your Pet 

​​​No specific routine laboratory monitoring is required for healthy dogs receiving Bravecto Quantum. However, your veterinarian may recommend monitoring based on your dog’s age, health status, or concurrent medications. 

​​​When Should You Call Your Veterinarian? 

Call your veterinarian if you see any of the following, or if you have additional questions or concerns about the use of Bravecto Quantum: 

  • Severe side effects occur  

  • Your pet’s condition worsens or does not improve  

  • You suspect an overdose 

What Happens If a Pet Overdoses on Bravecto Quantum?

Because Bravecto Quantum is ​given as ​an injection by a veterinarian, overdoses are uncommon. 

In a ​safety study, dogs given ​repeated higher-than-recommended doses every four months ​for a total of ​six​ doses developed injection site swelling and redness​. In ​​​very ​​​rare cases, more serious effects such as seizures and rectal prolapse were reported.​​     ​ 

If you suspect your dog received an overdose, tell your veterinarian or contact an animal poison control center. Consultation fees may apply. 

Bravecto Quantum for Dogs ​​FAQs

How long does Bravecto Quantum last in dogs?

Bra​v​ecto Quantum lasts 12 months in dogs for treatment and prevention of fleas and ticks. 

Is Bravecto Quantum safer than oral Bravecto?

​​Both Bravecto Quantum and oral ​Bravecto​ are considered safe​ when used as directed by a veterinarian​. ​They’re​ generally ​well ​tolerated and ​have ​​a low risk of side effects, ​including vomiting, diarrhea, and decreased appetite. ​However, b​oth medications should be used​ with caution​ in dogs with a history of seizures or neurologic disease.​​​ 

Can dogs with seizures take Bravecto Quantum?

​​Bravecto Quantum should be used with caution in dogs with a history of seizures due to the potential​ risk of neurological side effects.​ Your veterinarian will help determine if this medication is appropriate for your dog.​ 

Is Bravecto Quantum better than NexGard or Simparica?

​​Bravecto Quantum​ provides similar effectiveness ​against fleas and ticks as ​NexGard​ or ​Simparica​. ​One key difference is convenience: ​Bravecto Quantum​ is given once yearly as an injection, while​ Nexgard and Simparica ​are​ given ​monthly as oral medications.​ ​​​ 

​​If you ​prefer less frequent dosing or ​have ​difficulty ​remembering monthly ​medications, ​talk to your vet about ​whether ​Bravecto Quantum​ is a good option for your dog​.​​​ 

If you​r dog is younger ​than 6 months of age or ​if ​you prefer ​a ​monthly treatment ​option​, you​r veterinarian may recommend ​Nexgard or Simparica. 


Molly Price, DVM

WRITTEN BY

Molly Price, DVM

Veterinarian

Dr. Molly Price has practiced small animal medicine for over 20 years and is a graduate of Texas A&M College of Veterinary Medicine...


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