Wobbliness (ataxia) after Lufenuron in cats

The FDA has received 30 reports of wobbliness (ataxia) in cats after Lufenuron. That is 2.7% of all reports for this medicine, compared with 4.7% across reports for all cat medicines, so it is reported less often than average with this medicine.

30Reports

13%Marked serious

0.0%Recovered

17%Died or euthanised

–Typical onset

How the animals did

Still unwell when reported

1 3.3%

Died

3 10%

Euthanised

2 6.7%

Not known

24 80%

Problems reported at the same time

13 43%

10 33%

7 23%

6 20%

5 17%

Nystagmus

4 13%

Tremors

4 13%

Vomiting

4 13%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

About this medicine

Lufenuron stops flea eggs from developing.

Questions owners ask

Can Lufenuron cause wobbliness (ataxia) in cats?: 30 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.
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) 186 reports · 1.6% of its reports
Wobbliness (ataxia) after Nitenpyram (Capstar) 171 reports · 2.0% of its reports
Wobbliness (ataxia) after Imidacloprid + Moxidectin (Advantage Multi) 530 reports · 6.5% of its reports

All reported side effects of Lufenuron in cats · Medicines most reported with wobbliness (ataxia)