Bravecto vs NexGard: Comparing Duration, Efficacy, and Tick Coverage for Dogs

Finding a tick on your dog after a walk can be unsettling. Ticks can transmit serious diseases such as Lyme, so an effective preventative is essential. Bravecto and NexGard are two of the most widely prescribed oral tick treatments. This guide compares their duration, efficacy, species coverage, safety, and cost to help you decide which product fits your dog’s needs.

How Bravecto and NexGard work

Both products are FDA‑approved prescription chewables belonging to the isoxazoline class. After ingestion, the active ingredient distributes into the skin’s tissue fluids and kills fleas and ticks that begin to feed. Neither product repels ticks; they kill the parasite once it attaches.

Key differences

• Active ingredient: Bravecto contains fluralaner; NexGard contains afoxolaner.
• Duration of protection: Bravecto is administered every 12 weeks (three months); NexGard is given monthly.

Speed of tick kill

Ticks need 24–48 hours of attachment to transmit Lyme‑causing bacteria. Bravecto begins killing ticks within about 12 hours, while NexGard reaches peak efficacy between 12 and 24 hours. Both products therefore reduce the risk of disease transmission.

Tick species covered

1. NexGard: black‑legged (deer) tick, American dog tick, lone star tick, Gulf Coast tick, brown dog tick, Asian longhorned tick.
2. Bravecto (12‑week chew): black‑legged, American dog, brown dog, Asian longhorned ticks for the full 12 weeks; lone star tick for 8 weeks.

If lone‑star ticks are prevalent in your area, the shorter 8‑week coverage with Bravecto may require additional dosing.

Choosing the right dosing schedule

Bravecto: Four doses per year, convenient for owners who prefer fewer reminders.

NexGard: Monthly dosing fits well with routine veterinary care and can be paired with other monthly preventatives such as heartworm medication.

Age, weight, and health considerations

• NexGard is approved for puppies ≥8 weeks old weighing at least 4 lb.
• Bravecto (12‑week chew) is labeled for dogs ≥6 months old weighing at least 4.4 lb.
• Bravecto’s label includes use in breeding, pregnant, and lactating dogs (with caution). NexGard is not recommended for pregnant or nursing dogs.
• Both products carry an FDA warning about rare neurologic reactions (tremors, ataxia, seizures). Discuss any history of seizures with your veterinarian.

Cost and convenience

Bravecto’s higher upfront cost covers three months, often resulting in a monthly price comparable to NexGard’s monthly chew. Topical formulations of Bravecto are also available for dogs that cannot take oral chews.

Additional parasite coverage

Both medications also kill fleas and screwworm. NexGard Plus adds heartworm and intestinal worm protection, while Bravecto Plus (topical) includes heartworm coverage. Ask your vet which combination best matches your dog’s risk profile.

Getting a prescription

Both products require a veterinarian’s prescription. Many clinics, including online services, can establish a veterinarian‑client‑patient relationship (VCPR) via telemedicine and provide a prescription and home delivery.

Bottom line

Bravecto offers longer, 12‑week protection with fewer administrations, while NexGard provides monthly dosing and broader tick‑species coverage, including the Gulf Coast tick. The optimal choice depends on your dog’s age, health status, regional tick threats, and your preferred dosing routine. Consult your veterinarian to determine the best preventive for your pet.