Retching after Fenbendazole in dogs

80 reports to the FDA describe retching in dogs given Fenbendazole. That is 1.4% of all reports for this medicine, compared with 0.2% across reports for all dog medicines, so it is reported unusually often with this medicine.

80Reports

18%Marked serious

16%Recovered

10%Died or euthanised

1 daysTypical onset

How soon it started

Same day

11 41%

1–2 days

10 37%

3–7 days

2 7.4%

1–4 weeks

3 11%

Over a month

1 3.7%

How the animals did

Recovered

12 15%

Recovered with lasting effects

1 1.3%

Still unwell when reported

9 11%

Died

7 8.8%

Euthanised

1 1.3%

Not known

50 63%

Problems reported at the same time

40 50%

25 31%

23 29%

14 18%

9 11%

7 8.8%

7 8.8%

6 7.5%

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 retching in dogs?: 80 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).

Retching with similar medicines

Retching after Pyrantel + Sarolaner (Simparica Trio) 77 reports · 0.1% of its reports
Retching after Febantel + Praziquantel + Pyrantel (Drontal Plus) 57 reports · 0.8% of its reports
Retching after Pyrantel 50 reports · 1.0% of its reports
Retching after Praziquantel + Pyrantel 36 reports · 1.0% of its reports

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