Overdose after Nitenpyram (Capstar) in dogs

343 reports to the FDA describe overdose in dogs given Nitenpyram. That is 3.2% of all reports for this medicine, compared with 1.3% across reports for all dog medicines, so it is reported unusually often with this medicine.

343Reports
7.0%Marked serious
13%Recovered
1.2%Died or euthanised
1 daysTypical onset
SponsoredWorried about your pet? Ask a veterinarian online, 24/7

How soon it started

Same day
86 39%
1–2 days
67 31%
3–7 days
31 14%
1–4 weeks
17 7.8%
Over a month
17 7.8%

How the animals did

Recovered
44 13%
Still unwell when reported
70 20%
Died
3 0.9%
Euthanised
1 0.3%
Not known
225 66%

Problems reported at the same time

Age of the animals

Under 1 year
48
1–3 years
81
4–7 years
99
8–11 years
54
12+ years
36

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 overdose in dogs?
343 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).

Overdose with similar medicines

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