Flumethrin + Imidacloprid (Seresto) side effects in cats
674 reports sent to the FDA between 2012 and 2026 involve Flumethrin + Imidacloprid in cats. The most reported problems were itching, application site reaction, hair loss. 40% were marked serious.
About this medicine
Imidacloprid kills fleas (spot-on or collar).
Products with this combination include Seresto. The FDA hides brand names in its public data, so these reports cover every product with the same active ingredients.
Most reported side effects
Share = percentage of this medicine's reports that mention the problem. One report can list several problems.
Reports that it didn't work
Some reports are about the medicine not working (for example a cat still getting fleas or heartworm), not about a side effect.
How soon problems started
Time from the first dose to the first sign, where both dates were reported (520 reports).
How the animals did
Breeds named most often
Popular breeds appear more often because there are more of them.
- Domestic Shorthair 350 reports
- Domestic Longhair 78 reports
- Domestic Mediumhair 45 reports
- Ragdoll 9 reports
- Maine Coon 8 reports
- Persian 8 reports
- Cat (other) 8 reports
- Domestic 7 reports
- Siamese 6 reports
- Russian 6 reports