Didn't stop ticks after Fluralaner (Bravecto) in dogs

6,711 reports to the FDA describe didn't stop ticks in dogs given Fluralaner. That is 9.8% of all reports for this medicine, compared with 2.3% across reports for all dog medicines, so it is reported unusually often with this medicine.

6,711Reports

57%Marked serious

6.6%Recovered

0.8%Died or euthanised

41 daysTypical onset

How soon it started

Same day

312 14%

1–2 days

53 2.4%

3–7 days

132 5.9%

1–4 weeks

452 20%

Over a month

1,291 58%

How the animals did

Recovered

424 6.3%

Recovered with lasting effects

17 0.3%

Still unwell when reported

5,436 81%

Died

28 0.4%

Euthanised

24 0.4%

Not known

782 12%

Problems reported at the same time

Didn't work as expected

2,293 34%

Didn't stop fleas

564 8.4%

Drug administration error

264 3.9%

Drug dose administration interval too long

151 2.3%

150 2.2%

110 1.6%

107 1.6%

88 1.3%

Age of the animals

Under 1 year

425

1–3 years

2,442

4–7 years

2,005

8–11 years

1,083

12+ years

343

About this medicine

Fluralaner kills fleas and ticks for up to 12 weeks (chewable or spot-on).

Products with this ingredient include Bravecto. The FDA hides brand names in its public data, so these reports cover every product with the same active ingredients.

In 2018 the FDA alerted owners and vets that isoxazoline products have been associated with neurologic reactions such as muscle tremors, wobbliness (ataxia) and seizures, including in animals with no history of them.

Questions owners ask

Can Fluralaner cause didn't stop ticks in dogs?: 6,711 reports link the two, but a report alone does not prove the medicine was the cause: other illnesses, other medicines or coincidence can be involved. Your vet can judge it for your animal.
How soon after a dose was it reported?: In half of the reports with dates, it started within 41 days of the first dose.
What should I do?: Don't give another dose until you've spoken to your vet, and keep the packaging so you can tell them the product and dose. Your vet can also report it to the FDA (or you can, through the manufacturer or FDA form 1932a).

Didn't stop ticks with similar medicines

Didn't stop ticks after Afoxolaner (NexGard) 8,328 reports · 15% of its reports
Didn't stop ticks after Sarolaner (Simparica) 2,073 reports · 12% of its reports
Didn't stop ticks after Lotilaner (Credelio) 843 reports · 8.5% of its reports
Didn't stop ticks after Afoxolaner + Moxidectin + Pyrantel (NexGard PLUS) 273 reports · 2.9% of its reports
Didn't stop ticks after Lotilaner + Moxidectin + Praziquantel + Pyrantel (Credelio Quattro) 53 reports · 1.7% of its reports

All reported side effects of Fluralaner in dogs · Medicines most reported with didn't stop ticks