Nitenpyram (Capstar) side effects in dogs
10,782 reports sent to the FDA between 2001 and 2026 involve Nitenpyram in dogs. The most reported problems were itching, lethargy, vomiting. 10.0% were marked serious, and where it was recorded, signs eased after stopping the medicine in 22% of cases.
About this medicine
Nitenpyram kills adult fleas quickly; a single-dose tablet.
Products with this ingredient include Capstar. 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 (7,061 reports).
How the animals did
Breeds named most often
Popular breeds appear more often because there are more of them.
- Chihuahua 830 reports
- Yorkshire Terrier 429 reports
- Shih Tzu 358 reports
- Labrador Retriever 354 reports
- Pit Bull 327 reports
- German Shepherd Dog 269 reports
- German Pomeranian Spitz 226 reports
- Dachshund 190 reports
- Jack Russell Terrier 148 reports
- Maltese 140 reports