Drug administration error after Fenbendazole in dogs

The FDA has received 61 reports of drug administration error in dogs after Fenbendazole. That is 1.0% of all reports for this medicine, compared with 0.4% across reports for all dog medicines, so it is reported unusually often with this medicine.

61Reports

56%Marked serious

25%Recovered

8.2%Died or euthanised

1 daysTypical onset

How soon it started

Same day

15 44%

1–2 days

6 18%

3–7 days

1 2.9%

1–4 weeks

4 12%

Over a month

8 24%

How the animals did

Recovered

15 25%

Still unwell when reported

33 54%

Died

4 6.6%

Euthanised

1 1.6%

Not known

8 13%

Problems reported at the same time

28 46%

15 25%

8 13%

6 9.8%

5 8.2%

Didn't work as expected

5 8.2%

Lethargy

4 6.6%

Underdose

4 6.6%

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 drug administration error in dogs?: 61 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).

Drug administration error with similar medicines

Drug administration error after Febantel + Praziquantel + Pyrantel (Drontal Plus) 69 reports · 1.0% of its reports
Drug administration error after Pyrantel 22 reports · 0.5% of its reports
Drug administration error after Praziquantel + Pyrantel 110 reports · 3.0% of its reports

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