Itching after Lufenuron in cats

The FDA has received 84 reports of itching in cats after Lufenuron. That is 7.6% of all reports for this medicine, compared with 8.9% across reports for all cat medicines.

84Reports
9.5%Marked serious
4.8%Recovered
2.4%Died or euthanised
21 daysTypical onset
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How soon it started

Same day
3 20%
1–2 days
2 13%
3–7 days
1 6.7%
1–4 weeks
3 20%
Over a month
6 40%

How the animals did

Recovered
4 4.8%
Still unwell when reported
5 6.0%
Died
2 2.4%
Not known
73 87%

Problems reported at the same time

Age of the animals

Under 1 year
12
1–3 years
30
4–7 years
18
8–11 years
14
12+ years
6

About this medicine

Lufenuron stops flea eggs from developing.

Questions owners ask

Can Lufenuron cause itching in cats?
84 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 21 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).

Itching with similar medicines

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