Diarrhea after Lotilaner (Credelio) in dogs

The FDA has received 1,243 reports of diarrhea in dogs after Lotilaner. That is 12% of all reports for this medicine, compared with 8.4% 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

Lotilaner kills fleas and ticks; monthly chewable.

Products with this ingredient include Credelio. 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 Lotilaner cause diarrhea in dogs?

1,243 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 1 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).

Diarrhea with similar medicines

• Diarrhea after Fluralaner (Bravecto) 5,046 reports · 7.3% of its reports
• Diarrhea after Afoxolaner (NexGard) 6,014 reports · 11% of its reports
• Diarrhea after Sarolaner (Simparica) 1,487 reports · 8.9% of its reports
• Diarrhea after Afoxolaner + Moxidectin + Pyrantel (NexGard PLUS) 938 reports · 10% of its reports
• Diarrhea after Lotilaner + Moxidectin + Praziquantel + Pyrantel (Credelio Quattro) 680 reports · 22% of its reports

All reported side effects of Lotilaner in dogs · Medicines most reported with diarrhea