Recumbency after Nitenpyram (Capstar) in dogs

The FDA has received 40 reports of recumbency in dogs after Nitenpyram. That is 0.4% of all reports for this medicine, compared with 0.4% across reports for all dog medicines.

40Reports

30%Marked serious

13%Recovered

30%Died or euthanised

Same dayTypical onset

How soon it started

Same day

9 56%

1–2 days

6 38%

3–7 days

0 0.0%

1–4 weeks

1 6.3%

Over a month

0 0.0%

How the animals did

Recovered

5 13%

Still unwell when reported

1 2.5%

Died

10 25%

Euthanised

2 5.0%

Not known

22 55%

Problems reported at the same time

20 50%

14 35%

12 30%

12 30%

11 28%

10 25%

8 20%

6 15%

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 recumbency in dogs?: 40 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 the same 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).

Recumbency with similar medicines

Recumbency after Spinosad (Comfortis) 131 reports · 0.2% of its reports
Recumbency after Lufenuron + Milbemycin Oxime (Sentinel) 52 reports · 0.2% of its reports
Recumbency after Imidacloprid + Moxidectin (Advantage Multi) 20 reports · 0.2% of its reports

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