Loss of appetite after Imidacloprid in dogs

147 reports to the FDA describe loss of appetite in dogs given Imidacloprid. That is 7.7% of all reports for this medicine, compared with 8.4% across reports for all dog medicines.

147Reports
31%Marked serious
19%Recovered
11%Died or euthanised
1 daysTypical onset
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How soon it started

Same day
50 37%
1–2 days
43 32%
3–7 days
18 13%
1–4 weeks
14 10%
Over a month
9 6.7%

How the animals did

Recovered
28 19%
Still unwell when reported
34 23%
Died
9 6.1%
Euthanised
7 4.8%
Not known
69 47%

Problems reported at the same time

82 56%
57 39%
32 22%
21 14%
Adipsia
17 12%
16 11%

Age of the animals

Under 1 year
13
1–3 years
40
4–7 years
35
8–11 years
31
12+ years
18

About this medicine

Imidacloprid kills fleas (spot-on or collar).

Questions owners ask

Can Imidacloprid cause loss of appetite in dogs?
147 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).

Loss of appetite with similar medicines

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