Abnormal movement after Fluralaner (Bravecto) in dogs

118 reports to the FDA describe abnormal movement in dogs given Fluralaner. That is 0.2% of all reports for this medicine, compared with 0.1% across reports for all dog medicines, so it is reported unusually often with this medicine.

118Reports
81%Marked serious
31%Recovered
14%Died or euthanised
2 daysTypical onset
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How soon it started

Same day
16 27%
1–2 days
15 25%
3–7 days
9 15%
1–4 weeks
5 8.5%
Over a month
14 24%

How the animals did

Recovered
30 25%
Recovered with lasting effects
6 5.1%
Still unwell when reported
55 47%
Died
8 6.8%
Euthanised
9 7.6%
Not known
10 8.5%

Problems reported at the same time

Age of the animals

Under 1 year
9
1–3 years
31
4–7 years
27
8–11 years
33
12+ years
18

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 abnormal movement in dogs?
118 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 2 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).

Abnormal movement with similar medicines

All reported side effects of Fluralaner in dogs · Medicines most reported with abnormal movement