Flumethrin — FDA Animal & Veterinary Adverse Event (ADE) Reports
Source: openFDA animalandveterinary/event.json, the FDA Center for Veterinary Medicine (CVM) adverse event report database. Data pulled 2026-07-22. Counts are report-level: one report may list multiple reactions and multiple animals, so figures are not additive and do not imply causation. Flumethrin is a active ingredient.
Total reports
Flumethrin: 142
Reports by species (top entries)
- Dog 113
- Cat 29
Top reported reactions (VEDDRA terms, top entries)
- Lack of efficacy (ectoparasite) - flea 98
- Pruritus 90
- Behavioural disorder NOS 14
- Lethargy (see also Central nervous system depression in 'Neurological') 9
- Application site pruritus 7
- Skin lesion NOS 7
- Weight loss 7
- Vomiting 6
- Anorexia 5
- Vocalisation 5
Source JSON: pdf-raw/ade/ade_active_ingredients_2026-07-22_b19.json (openFDA animalandveterinary/event.json, pulled 2026-07-22).