Blood problems after Lufenuron in cats

23 reports to the FDA describe blood problems in cats given Lufenuron. That is 2.1% of all reports for this medicine, compared with 1.9% across reports for all cat medicines.

23Reports

8.7%Marked serious

0.0%Recovered

30%Died or euthanised

–Typical onset

How the animals did

Still unwell when reported

1 4.3%

Died

7 30%

Not known

15 65%

Problems reported at the same time

15 65%

13 57%

7 30%

6 26%

6 26%

5 22%

5 22%

4 17%

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 blood problems in cats?: 23 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).

Blood problems with similar medicines

Blood problems after Spinosad (Comfortis) 38 reports · 0.3% of its reports
Blood problems after Nitenpyram (Capstar) 64 reports · 0.7% of its reports
Blood problems after Imidacloprid + Moxidectin (Advantage Multi) 58 reports · 0.7% of its reports

All reported side effects of Lufenuron in cats · Medicines most reported with blood problems