Medication error after Fenbendazole in dogs

54 reports to the FDA describe medication error in dogs given Fenbendazole. That is 0.9% of all reports for this medicine, compared with 0.6% across reports for all dog medicines, so it is reported unusually often with this medicine.

54Reports

44%Marked serious

24%Recovered

1.9%Died or euthanised

Same dayTypical onset

How soon it started

Same day

21 58%

1–2 days

1 2.8%

3–7 days

1 2.8%

1–4 weeks

4 11%

Over a month

9 25%

How the animals did

Recovered

12 22%

Recovered with lasting effects

1 1.9%

Still unwell when reported

38 70%

Died

1 1.9%

Not known

2 3.7%

Problems reported at the same time

16 30%

15 28%

12 22%

8 15%

7 13%

7 13%

6 11%

6 11%

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 medication error in dogs?: 54 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).

Medication error with similar medicines

Medication error after Pyrantel + Sarolaner (Simparica Trio) 1,862 reports · 3.5% of its reports
Medication error after Pyrantel 20 reports · 0.4% of its reports

All reported side effects of Fenbendazole in dogs · Medicines most reported with medication error