Kidney problems after Fenbendazole in dogs

76 reports to the FDA describe kidney problems in dogs given Fenbendazole. That is 1.3% of all reports for this medicine, compared with 2.4% across reports for all dog medicines, so it is reported less often than average with this medicine.

76Reports

79%Marked serious

9.2%Recovered

41%Died or euthanised

11 daysTypical onset

How soon it started

Same day

4 8.3%

1–2 days

12 25%

3–7 days

6 13%

1–4 weeks

19 40%

Over a month

7 15%

How the animals did

Recovered

6 7.9%

Recovered with lasting effects

1 1.3%

Still unwell when reported

24 32%

Died

15 20%

Euthanised

16 21%

Not known

14 18%

Problems reported at the same time

36 47%

34 45%

33 43%

30 39%

28 37%

20 26%

20 26%

16 21%

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 kidney problems in dogs?: 76 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 11 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).

Kidney problems with similar medicines

Kidney problems after Pyrantel + Sarolaner (Simparica Trio) 293 reports · 0.5% of its reports
Kidney problems after Febantel + Praziquantel + Pyrantel (Drontal Plus) 55 reports · 0.8% of its reports
Kidney problems after Pyrantel 81 reports · 1.7% of its reports
Kidney problems after Praziquantel + Pyrantel 22 reports · 0.6% of its reports

All reported side effects of Fenbendazole in dogs · Medicines most reported with kidney problems