Imidacloprid + Pyriproxyfen side effects in cats
655 reports sent to the FDA between 2011 and 2026 involve Imidacloprid + Pyriproxyfen in cats. The most reported problems were itching, hair loss, behaviour change. 37% were marked serious.
655Reports
37%Marked serious
0.0%Only medicine involved
20%Recovered
4.4%Died or euthanised
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About this medicine
Imidacloprid kills fleas (spot-on or collar).
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 (429 reports).
How the animals did
Breeds named most often
Popular breeds appear more often because there are more of them.
- Domestic Shorthair 315 reports
- Domestic Longhair 77 reports
- Domestic Mediumhair 49 reports
- Maine Coon 15 reports
- Siamese 12 reports
- Persian 10 reports
- Domestic 7 reports
- Ragdoll 4 reports
- Himalayan 3 reports
- Birman (sacred Birman) 2 reports
Other flea and tick treatments for cats
Spinosad (Comfortis)11,584 reports · 6.7% seriousNitenpyram (Capstar)8,744 reports · 11% seriousImidacloprid + Moxidectin (Advantage Multi)8,157 reports · 52% seriousLufenuron1,108 reports · 8.8% seriousFlumethrin + Imidacloprid (Seresto)674 reports · 40% seriousFipronil503 reports · 21% seriousFipronil + S-methoprene (Frontline Plus)367 reports · 22% seriousImidacloprid252 reports · 20% serious