Vomiting after Fipronil in dogs

417 reports to the FDA describe vomiting in dogs given Fipronil. That is 30% of all reports for this medicine, compared with 28% across reports for all dog medicines.

417Reports
23%Marked serious
78%Recovered
4.6%Died or euthanised
64 daysTypical onset
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How soon it started

Same day
47 16%
1–2 days
10 3.3%
3–7 days
15 5.0%
1–4 weeks
48 16%
Over a month
182 60%

How the animals did

Recovered
310 74%
Recovered with lasting effects
16 3.8%
Still unwell when reported
24 5.8%
Died
7 1.7%
Euthanised
12 2.9%
Not known
48 12%

Problems reported at the same time

Age of the animals

Under 1 year
57
1–3 years
140
4–7 years
100
8–11 years
78
12+ years
33

About this medicine

Fipronil kills fleas and ticks (spot-on).

Questions owners ask

Can Fipronil cause vomiting in dogs?
417 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 64 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).

Vomiting with similar medicines

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