Abnormal radiograph finding after Fluralaner (Bravecto) in cats

The FDA has received 42 reports of abnormal radiograph finding in cats after Fluralaner. That is 0.4% of all reports for this medicine, compared with 1.0% across reports for all cat medicines, so it is reported less often than average with this medicine.

42Reports
100%Marked serious
12%Recovered
24%Died or euthanised
1 daysTypical onset
SponsoredWorried about your pet? Ask a veterinarian online, 24/7

How soon it started

Same day
16 43%
1–2 days
9 24%
3–7 days
3 8.1%
1–4 weeks
6 16%
Over a month
3 8.1%

How the animals did

Recovered
3 7.1%
Recovered with lasting effects
2 4.8%
Still unwell when reported
19 45%
Died
3 7.1%
Euthanised
7 17%
Not known
8 19%

Problems reported at the same time

Age of the animals

Under 1 year
0
1–3 years
8
4–7 years
7
8–11 years
19
12+ years
8

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 radiograph finding in cats?
42 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 1 day 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 radiograph finding with similar medicines

All reported side effects of Fluralaner in cats · Medicines most reported with abnormal radiograph finding