Death after Nitenpyram (Capstar) in dogs

349 reports to the FDA describe death in dogs given Nitenpyram. That is 3.2% of all reports for this medicine, compared with 5.2% across reports for all dog medicines, so it is reported less often than average with this medicine.

349Reports

70%Marked serious

0.0%Recovered

98%Died or euthanised

1 daysTypical onset

How soon it started

Same day

87 41%

1–2 days

53 25%

3–7 days

16 7.5%

1–4 weeks

27 13%

Over a month

29 14%

How the animals did

Died

274 79%

Euthanised

69 20%

Not known

6 1.7%

Problems reported at the same time

102 29%

87 25%

86 25%

69 20%

53 15%

45 13%

29 8.3%

28 8.0%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

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.

Questions owners ask

Can Nitenpyram cause death in dogs?: 349 reports link the two, but a report alone does not prove the medicine was the cause: other illnesses, other medicines or coincidence can be involved. Your vet can judge it for your animal.
How soon after a dose was it reported?: In half of the reports with dates, it started within 1 day of the first dose.
What should I do?: Don't give another dose until you've spoken to your vet, and keep the packaging so you can tell them the product and dose. Your vet can also report it to the FDA (or you can, through the manufacturer or FDA form 1932a).

Death with similar medicines

Death after Spinosad (Comfortis) 1,441 reports · 2.5% of its reports
Death after Lufenuron + Milbemycin Oxime (Sentinel) 545 reports · 2.1% of its reports
Death after Imidacloprid + Moxidectin (Advantage Multi) 511 reports · 3.9% of its reports
Death after Lufenuron + Milbemycin Oxime + Praziquantel (Sentinel Spectrum) 139 reports · 1.4% of its reports
Death after Fipronil + S-methoprene (Frontline Plus) 98 reports · 3.3% of its reports
Death after Flumethrin + Imidacloprid (Seresto) 69 reports · 3.0% of its reports
Death after Imidacloprid 48 reports · 2.5% of its reports
Death after Fipronil 52 reports · 3.7% of its reports
Death after Lufenuron 74 reports · 7.3% of its reports
Death after Imidacloprid + Permethrin + Pyriproxyfen 29 reports · 3.9% of its reports

All reported side effects of Nitenpyram in dogs · Medicines most reported with death