Drooling after Fluralaner (Bravecto) in cats

720 reports to the FDA describe drooling in cats given Fluralaner. That is 6.8% of all reports for this medicine, compared with 5.6% across reports for all cat medicines.

720Reports
55%Marked serious
42%Recovered
3.5%Died or euthanised
Same dayTypical onset
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How soon it started

Same day
555 86%
1–2 days
44 6.8%
3–7 days
7 1.1%
1–4 weeks
15 2.3%
Over a month
27 4.2%

How the animals did

Recovered
297 41%
Recovered with lasting effects
3 0.4%
Still unwell when reported
353 49%
Died
11 1.5%
Euthanised
14 1.9%
Not known
42 5.8%

Problems reported at the same time

Age of the animals

Under 1 year
85
1–3 years
245
4–7 years
136
8–11 years
122
12+ years
89

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 drooling in cats?
720 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 the same 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).

Drooling with similar medicines

All reported side effects of Fluralaner in cats · Medicines most reported with drooling