Elevated amylase after Fluralaner (Bravecto) in dogs

The FDA has received 174 reports of elevated amylase in dogs after Fluralaner. That is 0.3% of all reports for this medicine, compared with 0.3% across reports for all dog medicines.

174Reports
97%Marked serious
7.5%Recovered
34%Died or euthanised
4 daysTypical onset
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How soon it started

Same day
25 22%
1–2 days
22 19%
3–7 days
18 16%
1–4 weeks
19 17%
Over a month
30 26%

How the animals did

Recovered
9 5.2%
Recovered with lasting effects
4 2.3%
Still unwell when reported
75 43%
Died
16 9.2%
Euthanised
43 25%
Not known
27 16%

Problems reported at the same time

Age of the animals

Under 1 year
3
1–3 years
35
4–7 years
47
8–11 years
58
12+ years
31

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 elevated amylase in dogs?
174 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 4 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).

Elevated amylase with similar medicines

All reported side effects of Fluralaner in dogs · Medicines most reported with elevated amylase