Flumethrin + Imidacloprid (Seresto) side effects in dogs
2,273 reports sent to the FDA between 2009 and 2026 involve Flumethrin + Imidacloprid in dogs. The most reported problems were itching, vomiting, lethargy. 25% 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 dog 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 (1,614 reports).
How the animals did
Breeds named most often
Popular breeds appear more often because there are more of them.
- Labrador Retriever 122 reports
- German Shepherd Dog 79 reports
- Chihuahua 78 reports
- Shih Tzu 73 reports
- Golden Retriever 64 reports
- Yorkshire Terrier 63 reports
- Australian Shepherd Dog 56 reports
- Beagle 33 reports
- Pit Bull 33 reports
- German Pomeranian Spitz 29 reports