Wobbliness (ataxia) after Flumethrin + Imidacloprid (Seresto) in dogs

45 reports to the FDA describe wobbliness (ataxia) in dogs given Flumethrin + Imidacloprid. That is 2.0% of all reports for this medicine, compared with 2.6% across reports for all dog medicines.

45Reports

73%Marked serious

24%Recovered

16%Died or euthanised

10 daysTypical onset

How soon it started

Same day

4 13%

1–2 days

7 23%

3–7 days

3 9.7%

1–4 weeks

10 32%

Over a month

7 23%

How the animals did

Recovered

11 24%

Still unwell when reported

13 29%

Died

3 6.7%

Euthanised

4 8.9%

Not known

14 31%

Problems reported at the same time

17 38%

15 33%

12 27%

12 27%

11 24%

9 20%

8 18%

7 16%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

About this medicine

Imidacloprid kills fleas (spot-on or collar).

Products with this combination include Seresto. The FDA hides brand names in its public data, so these reports cover every product with the same active ingredients.

Questions owners ask

Can Flumethrin + Imidacloprid cause wobbliness (ataxia) in dogs?: 45 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 10 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).

Wobbliness (ataxia) with similar medicines

Wobbliness (ataxia) after Spinosad (Comfortis) 1,456 reports · 2.6% of its reports
Wobbliness (ataxia) after Lufenuron + Milbemycin Oxime (Sentinel) 504 reports · 1.9% of its reports
Wobbliness (ataxia) after Imidacloprid + Moxidectin (Advantage Multi) 658 reports · 5.0% of its reports
Wobbliness (ataxia) after Nitenpyram (Capstar) 219 reports · 2.0% of its reports
Wobbliness (ataxia) after Lufenuron + Milbemycin Oxime + Praziquantel (Sentinel Spectrum) 167 reports · 1.7% of its reports
Wobbliness (ataxia) after Fipronil + S-methoprene (Frontline Plus) 79 reports · 2.7% of its reports
Wobbliness (ataxia) after Imidacloprid 61 reports · 3.2% of its reports
Wobbliness (ataxia) after Fipronil 32 reports · 2.3% of its reports
Wobbliness (ataxia) after Lufenuron 27 reports · 2.7% of its reports
Wobbliness (ataxia) after Imidacloprid + Permethrin + Pyriproxyfen 29 reports · 3.9% of its reports

All reported side effects of Flumethrin + Imidacloprid in dogs · Medicines most reported with wobbliness (ataxia)