Accidental exposure after Fenbendazole in dogs

The FDA has received 62 reports of accidental exposure in dogs after Fenbendazole. That is 1.1% of all reports for this medicine, compared with 1.5% across reports for all dog medicines.

62Reports

16%Marked serious

15%Recovered

4.8%Died or euthanised

Same dayTypical onset

How soon it started

Same day

9 64%

1–2 days

5 36%

3–7 days

0 0.0%

1–4 weeks

0 0.0%

Over a month

0 0.0%

How the animals did

Recovered

9 15%

Still unwell when reported

11 18%

Died

3 4.8%

Not known

39 63%

Problems reported at the same time

23 37%

20 32%

13 21%

11 18%

11 18%

7 11%

6 9.7%

Restlessness or agitation

5 8.1%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

About this medicine

Fenbendazole treats intestinal worms and some other parasites.

Questions owners ask

Can Fenbendazole cause accidental exposure in dogs?: 62 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 the same 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).

Accidental exposure with similar medicines

Accidental exposure after Pyrantel + Sarolaner (Simparica Trio) 99 reports · 0.2% of its reports
Accidental exposure after Febantel + Praziquantel + Pyrantel (Drontal Plus) 21 reports · 0.3% of its reports
Accidental exposure after Pyrantel 156 reports · 3.3% of its reports
Accidental exposure after Praziquantel + Pyrantel 71 reports · 1.9% of its reports

All reported side effects of Fenbendazole in dogs · Medicines most reported with accidental exposure