Vocalising after Nitenpyram (Capstar) in cats

The FDA has received 1,314 reports of vocalising in cats after Nitenpyram. That is 15% of all reports for this medicine, compared with 3.1% across reports for all cat medicines, so it is reported unusually often with this medicine.

1,314Reports

10.0%Marked serious

37%Recovered

3.4%Died or euthanised

Same dayTypical onset

How soon it started

Same day

950 89%

1–2 days

38 3.6%

3–7 days

13 1.2%

1–4 weeks

35 3.3%

Over a month

31 2.9%

How the animals did

Recovered

484 37%

Recovered with lasting effects

1 0.1%

Still unwell when reported

239 18%

Died

32 2.4%

Euthanised

13 1.0%

Not known

545 41%

Problems reported at the same time

Restlessness or agitation

954 73%

576 44%

450 34%

126 9.6%

89 6.8%

89 6.8%

Excessive licking and/or grooming

74 5.6%

Hiding

70 5.3%

Age of the animals

Under 1 year

224

1–3 years

421

4–7 years

310

8–11 years

160

12+ years

150

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 vocalising in cats?: 1,314 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).

Vocalising with similar medicines

Vocalising after Spinosad (Comfortis) 150 reports · 1.3% of its reports
Vocalising after Imidacloprid + Moxidectin (Advantage Multi) 213 reports · 2.6% of its reports
Vocalising after Lufenuron 24 reports · 2.2% of its reports
Vocalising after Flumethrin + Imidacloprid (Seresto) 21 reports · 3.1% of its reports
Vocalising after Imidacloprid + Pyriproxyfen 30 reports · 4.6% of its reports
Vocalising after Fipronil 29 reports · 5.8% of its reports
Vocalising after Imidacloprid 21 reports · 8.3% of its reports

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