Hair loss after Fluralaner (Bravecto) in dogs

776 reports to the FDA describe hair loss in dogs given Fluralaner. That is 1.1% of all reports for this medicine, compared with 1.0% across reports for all dog medicines.

776Reports

70%Marked serious

13%Recovered

3.7%Died or euthanised

7 daysTypical onset

How soon it started

Same day

82 16%

1–2 days

111 22%

3–7 days

112 22%

1–4 weeks

86 17%

Over a month

117 23%

How the animals did

Recovered

86 11%

Recovered with lasting effects

18 2.3%

Still unwell when reported

517 67%

Died

11 1.4%

Euthanised

18 2.3%

Not known

126 16%

Problems reported at the same time

Itching

312 40%

Skin rash or irritation

117 15%

103 13%

97 13%

96 12%

71 9.1%

63 8.1%

57 7.3%

Age of the animals

Under 1 year

1–3 years

220

4–7 years

216

8–11 years

165

12+ years

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 hair loss in dogs?: 776 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 7 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).

Hair loss with similar medicines

Hair loss after Afoxolaner (NexGard) 844 reports · 1.5% of its reports
Hair loss after Sarolaner (Simparica) 132 reports · 0.8% of its reports
Hair loss after Lotilaner (Credelio) 102 reports · 1.0% of its reports
Hair loss after Afoxolaner + Moxidectin + Pyrantel (NexGard PLUS) 70 reports · 0.8% of its reports
Hair loss after Lotilaner + Moxidectin + Praziquantel + Pyrantel (Credelio Quattro) 48 reports · 1.6% of its reports

All reported side effects of Fluralaner in dogs · Medicines most reported with hair loss