Abnormal radiograph finding after Fenbendazole in dogs

70 reports to the FDA describe abnormal radiograph finding in dogs given Fenbendazole. That is 1.2% of all reports for this medicine, compared with 0.9% across reports for all dog medicines.

70Reports

67%Marked serious

8.6%Recovered

34%Died or euthanised

12 daysTypical onset

How soon it started

Same day

7 16%

1–2 days

5 11%

3–7 days

7 16%

1–4 weeks

10 23%

Over a month

15 34%

How the animals did

Recovered

5 7.1%

Recovered with lasting effects

1 1.4%

Still unwell when reported

19 27%

Died

12 17%

Euthanised

12 17%

Not known

21 30%

Problems reported at the same time

31 44%

31 44%

28 40%

25 36%

24 34%

19 27%

13 19%

13 19%

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 abnormal radiograph finding in dogs?: 70 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 12 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).

Abnormal radiograph finding with similar medicines

Abnormal radiograph finding after Pyrantel + Sarolaner (Simparica Trio) 118 reports · 0.2% of its reports
Abnormal radiograph finding after Febantel + Praziquantel + Pyrantel (Drontal Plus) 25 reports · 0.4% of its reports
Abnormal radiograph finding after Pyrantel 48 reports · 1.0% of its reports

All reported side effects of Fenbendazole in dogs · Medicines most reported with abnormal radiograph finding