Fever after Nitenpyram (Capstar) in cats

239 reports to the FDA describe fever in cats given Nitenpyram. That is 2.7% of all reports for this medicine, compared with 3.2% across reports for all cat medicines.

239Reports

37%Marked serious

26%Recovered

3.3%Died or euthanised

Same dayTypical onset

How soon it started

Same day

76 63%

1–2 days

20 17%

3–7 days

11 9.2%

1–4 weeks

9 7.5%

Over a month

4 3.3%

How the animals did

Recovered

60 25%

Recovered with lasting effects

1 0.4%

Still unwell when reported

36 15%

Died

6 2.5%

Euthanised

2 0.8%

Not known

134 56%

Problems reported at the same time

Restlessness or agitation

96 40%

89 37%

57 24%

54 23%

41 17%

31 13%

30 13%

24 10%

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 fever in cats?: 239 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).

Fever with similar medicines

Fever after Spinosad (Comfortis) 78 reports · 0.7% of its reports
Fever after Imidacloprid + Moxidectin (Advantage Multi) 182 reports · 2.2% of its reports
Fever after Lufenuron 80 reports · 7.2% of its reports

All reported side effects of Nitenpyram in cats · Medicines most reported with fever