Inappropriate urination after Fenbendazole in dogs

25 reports to the FDA describe inappropriate urination in dogs given Fenbendazole. That is 0.4% of all reports for this medicine, compared with 0.5% across reports for all dog medicines.

25Reports

68%Marked serious

28%Recovered

16%Died or euthanised

5 daysTypical onset

How soon it started

Same day

5 25%

1–2 days

4 20%

3–7 days

2 10%

1–4 weeks

4 20%

Over a month

5 25%

How the animals did

Recovered

7 28%

Still unwell when reported

9 36%

Euthanised

4 16%

Not known

5 20%

Problems reported at the same time

Vomiting

11 44%

Lethargy

10 40%

Loss of appetite

10 40%

Abnormal radiograph finding

6 24%

6 24%

5 20%

5 20%

5 20%

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 inappropriate urination in dogs?: 25 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 5 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).

Inappropriate urination with similar medicines

Inappropriate urination after Pyrantel + Sarolaner (Simparica Trio) 247 reports · 0.5% of its reports
Inappropriate urination after Febantel + Praziquantel + Pyrantel (Drontal Plus) 31 reports · 0.5% of its reports
Inappropriate urination after Pyrantel 22 reports · 0.5% of its reports
Inappropriate urination after Praziquantel + Pyrantel 25 reports · 0.7% of its reports

All reported side effects of Fenbendazole in dogs · Medicines most reported with inappropriate urination