Imidacloprid side effects in dogs
1,908 reports sent to the FDA between 2010 and 2026 involve Imidacloprid in dogs. The most reported problems were itching, vomiting, lethargy. 11% were marked serious, and where it was recorded, signs eased after stopping the medicine in 100% of cases.
1,908Reports
11%Marked serious
74%Only medicine involved
12%Recovered
2.7%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 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 (1,668 reports).
How the animals did
Breeds named most often
Popular breeds appear more often because there are more of them.
- Chihuahua 119 reports
- Pit Bull 61 reports
- Labrador Retriever 59 reports
- Shih Tzu 55 reports
- Yorkshire Terrier 51 reports
- German Shepherd Dog 51 reports
- Australian Shepherd Dog 32 reports
- German Pomeranian Spitz 25 reports
- Siberian Husky 24 reports
- Maltese 20 reports
Other flea and tick treatments for dogs
Spinosad (Comfortis)57,095 reports · 7.7% seriousLufenuron + Milbemycin Oxime (Sentinel)26,051 reports · 24% seriousImidacloprid + Moxidectin (Advantage Multi)13,117 reports · 57% seriousNitenpyram (Capstar)10,782 reports · 10.0% seriousLufenuron + Milbemycin Oxime + Praziquantel (Sentinel Spectrum)9,966 reports · 40% seriousFipronil + S-methoprene (Frontline Plus)2,954 reports · 49% seriousFlumethrin + Imidacloprid (Seresto)2,273 reports · 25% seriousFipronil1,411 reports · 26% serious