Imidacloprid side effects in cats
252 reports sent to the FDA between 2010 and 2026 involve Imidacloprid in cats. The most reported problems were itching, vomiting, lethargy. 20% were marked serious.
252Reports
20%Marked serious
0.4%Only medicine involved
22%Recovered
6.7%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 (193 reports).
How the animals did
Breeds named most often
Popular breeds appear more often because there are more of them.
- Domestic Shorthair 120 reports
- Domestic Longhair 25 reports
- Domestic Mediumhair 11 reports
- Maine Coon 8 reports
- Siamese 4 reports
- Ragdoll 3 reports
- American Shorthair 3 reports
- Russian 3 reports
- Cat (other) 3 reports
- Himalayan 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% seriousImidacloprid + Pyriproxyfen655 reports · 37% seriousFipronil503 reports · 21% seriousFipronil + S-methoprene (Frontline Plus)367 reports · 22% serious