Weight loss after Permethrin + Pyriproxyfen in dogs

21 reports to the FDA describe weight loss in dogs given Permethrin + Pyriproxyfen. That is 4.3% of all reports for this medicine, compared with 1.7% across reports for all dog medicines, so it is reported unusually often with this medicine.

21Reports
81%Marked serious
14%Recovered
48%Died or euthanised
–Typical onset
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How the animals did

Recovered
3 14%
Still unwell when reported
5 24%
Died
1 4.8%
Euthanised
9 43%
Not known
3 14%

Problems reported at the same time

11 52%
10 48%
Blood problems
8 38%
Fever
6 29%

Age of the animals

Under 1 year
2
1–3 years
6
4–7 years
5
8–11 years
5
12+ years
3

About this medicine

Type: medicine.

Questions owners ask

Can Permethrin + Pyriproxyfen cause weight loss in dogs?
21 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).

Weight loss with similar medicines

All reported side effects of Permethrin + Pyriproxyfen in dogs · Medicines most reported with weight loss