Nausea after Fenbendazole in dogs

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

24Reports

54%Marked serious

33%Recovered

13%Died or euthanised

1 daysTypical onset

How soon it started

Same day

6 33%

1–2 days

7 39%

3–7 days

1 5.6%

1–4 weeks

3 17%

Over a month

1 5.6%

How the animals did

Recovered

8 33%

Still unwell when reported

7 29%

Died

2 8.3%

Euthanised

1 4.2%

Not known

6 25%

Problems reported at the same time

12 50%

11 46%

7 29%

4 17%

4 17%

Restlessness or agitation

3 13%

Liver problems

3 13%

Diarrhea

3 13%

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 nausea 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.
How soon after a dose was it reported?: In half of the reports with dates, it started within 1 day 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).

Nausea with similar medicines

Nausea after Pyrantel + Sarolaner (Simparica Trio) 193 reports · 0.4% of its reports
Nausea after Febantel + Praziquantel + Pyrantel (Drontal Plus) 20 reports · 0.3% of its reports
Nausea after Praziquantel + Pyrantel 20 reports · 0.5% of its reports

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