Eye or vision problems after Fluralaner (Bravecto) in dogs

The FDA has received 298 reports of eye or vision problems in dogs after Fluralaner. That is 0.4% of all reports for this medicine, compared with 0.7% across reports for all dog medicines, so it is reported less often than average with this medicine.

298Reports
96%Marked serious
46%Recovered
27%Died or euthanised
3 daysTypical onset
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How soon it started

Same day
33 21%
1–2 days
43 27%
3–7 days
19 12%
1–4 weeks
30 19%
Over a month
35 22%

How the animals did

Recovered
44 15%
Recovered with lasting effects
94 32%
Still unwell when reported
48 16%
Died
16 5.4%
Euthanised
65 22%
Not known
31 10%

Problems reported at the same time

Age of the animals

Under 1 year
22
1–3 years
55
4–7 years
73
8–11 years
86
12+ years
47

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 eye or vision problems in dogs?
298 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 3 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).

Eye or vision problems with similar medicines

All reported side effects of Fluralaner in dogs · Medicines most reported with eye or vision problems