Vomiting after Fenbendazole in dogs

2,054 reports to the FDA describe vomiting in dogs given Fenbendazole. That is 35% of all reports for this medicine, compared with 28% across reports for all dog medicines.

2,054Reports

22%Marked serious

26%Recovered

9.5%Died or euthanised

1 daysTypical onset

How soon it started

Same day

406 43%

1–2 days

282 30%

3–7 days

96 10%

1–4 weeks

68 7.2%

Over a month

94 9.9%

How the animals did

Recovered

532 26%

Recovered with lasting effects

2 0.1%

Still unwell when reported

357 17%

Died

160 7.8%

Euthanised

35 1.7%

Not known

968 47%

Problems reported at the same time

549 27%

496 24%

476 23%

190 9.3%

110 5.4%

72 3.5%

Didn't work as expected

71 3.5%

Tremors

70 3.4%

Age of the animals

Under 1 year

1,196

1–3 years

351

4–7 years

215

8–11 years

117

12+ years

About this medicine

Fenbendazole treats intestinal worms and some other parasites.

Questions owners ask

Can Fenbendazole cause vomiting in dogs?: 2,054 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).

Vomiting with similar medicines

Vomiting after Pyrantel + Sarolaner (Simparica Trio) 10,822 reports · 20% of its reports
Vomiting after Febantel + Praziquantel + Pyrantel (Drontal Plus) 3,844 reports · 57% of its reports
Vomiting after Pyrantel 1,528 reports · 32% of its reports
Vomiting after Praziquantel + Pyrantel 1,813 reports · 49% of its reports
Vomiting after Praziquantel 255 reports · 23% of its reports

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