Weight loss after Fluralaner (Bravecto) in dogs

897 reports to the FDA describe weight loss in dogs given Fluralaner. That is 1.3% of all reports for this medicine, compared with 1.7% across reports for all dog medicines.

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How soon it started

How the animals did

Problems reported at the same time

Age of the animals

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 weight loss in dogs?

897 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).

Weight loss with similar medicines

• Weight loss after Afoxolaner (NexGard) 504 reports · 0.9% of its reports
• Weight loss after Sarolaner (Simparica) 178 reports · 1.1% of its reports
• Weight loss after Lotilaner (Credelio) 160 reports · 1.6% of its reports
• Weight loss after Afoxolaner + Moxidectin + Pyrantel (NexGard PLUS) 42 reports · 0.5% of its reports
• Weight loss after Lotilaner + Moxidectin + Praziquantel + Pyrantel (Credelio Quattro) 36 reports · 1.2% of its reports

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