Didn't stop fleas after Lufenuron in dogs

The FDA has received 44 reports of didn't stop fleas in dogs after Lufenuron. That is 4.3% of all reports for this medicine, compared with 6.2% across reports for all dog medicines.

44Reports
2.3%Marked serious
0.0%Recovered
0.0%Died or euthanised
87 daysTypical onset
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How soon it started

Same day
0 0.0%
1–2 days
0 0.0%
3–7 days
0 0.0%
1–4 weeks
5 38%
Over a month
8 62%

How the animals did

Still unwell when reported
10 23%
Not known
34 77%

Problems reported at the same time

Itching
7 16%
Drug dose administration interval too short
3 6.8%
Vomiting
2 4.5%
Hair loss
2 4.5%
Product defect, general
2 4.5%
Drug dose omission
2 4.5%
Allergic reaction
1 2.3%
Skin hyperaemia
1 2.3%

Age of the animals

Under 1 year
5
1–3 years
6
4–7 years
5
8–11 years
13
12+ years
8

About this medicine

Lufenuron stops flea eggs from developing.

Questions owners ask

Can Lufenuron cause didn't stop fleas in dogs?
44 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 87 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).

Didn't stop fleas with similar medicines

All reported side effects of Lufenuron in dogs · Medicines most reported with didn't stop fleas