Cough after Fenbendazole in dogs

The FDA has received 101 reports of cough in dogs after Fenbendazole. That is 1.7% of all reports for this medicine, compared with 0.8% across reports for all dog medicines, so it is reported unusually often with this medicine.

101Reports

50%Marked serious

22%Recovered

6.9%Died or euthanised

9 daysTypical onset

How soon it started

Same day

6 11%

1–2 days

12 21%

3–7 days

9 16%

1–4 weeks

22 39%

Over a month

8 14%

How the animals did

Recovered

22 22%

Still unwell when reported

34 34%

Died

4 4.0%

Euthanised

3 3.0%

Not known

38 38%

Problems reported at the same time

Vomiting

22 22%

Lethargy

21 21%

Loss of appetite

20 20%

Abnormal radiograph finding

13 13%

Diarrhea

13 13%

Breathing problems

10 9.9%

Didn't work as expected

10 9.9%

Retching

9 8.9%

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 cough in dogs?: 101 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 9 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).

Cough with similar medicines

Cough after Pyrantel + Sarolaner (Simparica Trio) 179 reports · 0.3% of its reports
Cough after Febantel + Praziquantel + Pyrantel (Drontal Plus) 45 reports · 0.7% of its reports
Cough after Pyrantel 122 reports · 2.5% of its reports
Cough after Praziquantel + Pyrantel 41 reports · 1.1% of its reports

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