Tarry or black stool after Fluralaner (Bravecto) in dogs
The FDA has received 87 reports of tarry or black stool in dogs after Fluralaner. That is 0.1% of all reports for this medicine, compared with 0.1% across reports for all dog medicines.
87Reports
90%Marked serious
15%Recovered
31%Died or euthanised
2 daysTypical onset
Sponsored
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 tarry or black stool in dogs?
- 87 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 2 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).
Tarry or black stool with similar medicines
- Tarry or black stool after Afoxolaner (NexGard) 85 reports · 0.1% of its reports
All reported side effects of Fluralaner in dogs · Medicines most reported with tarry or black stool