Urinary incontinence after Fenbendazole in dogs

The FDA has received 24 reports of urinary incontinence in dogs after Fenbendazole. That is 0.4% of all reports for this medicine, compared with 0.6% across reports for all dog medicines.

24Reports

50%Marked serious

4.2%Recovered

33%Died or euthanised

–Typical onset

How the animals did

Recovered

1 4.2%

Still unwell when reported

5 21%

Died

2 8.3%

Euthanised

6 25%

Not known

10 42%

Problems reported at the same time

8 33%

7 29%

7 29%

6 25%

6 25%

5 21%

5 21%

5 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 urinary incontinence in dogs?: 24 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.
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).

Urinary incontinence with similar medicines

Urinary incontinence after Pyrantel + Sarolaner (Simparica Trio) 187 reports · 0.4% of its reports
Urinary incontinence after Pyrantel 22 reports · 0.5% of its reports

All reported side effects of Fenbendazole in dogs · Medicines most reported with urinary incontinence