Overdose after Imidacloprid in dogs

The FDA has received 103 reports of overdose in dogs after Imidacloprid. That is 5.4% of all reports for this medicine, compared with 1.3% across reports for all dog medicines, so it is reported unusually often with this medicine.

103Reports
6.8%Marked serious
16%Recovered
1.0%Died or euthanised
Same dayTypical onset
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How soon it started

Same day
57 61%
1–2 days
20 22%
3–7 days
8 8.6%
1–4 weeks
4 4.3%
Over a month
4 4.3%

How the animals did

Recovered
16 16%
Still unwell when reported
11 11%
Died
1 1.0%
Not known
75 73%

Problems reported at the same time

Age of the animals

Under 1 year
17
1–3 years
32
4–7 years
18
8–11 years
17
12+ years
0

About this medicine

Imidacloprid kills fleas (spot-on or collar).

Questions owners ask

Can Imidacloprid cause overdose in dogs?
103 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 the same 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).

Overdose with similar medicines

All reported side effects of Imidacloprid in dogs · Medicines most reported with overdose