Inappropriate urination after Nitenpyram (Capstar) in cats

52 reports to the FDA describe inappropriate urination in cats given Nitenpyram. That is 0.6% of all reports for this medicine, compared with 0.7% across reports for all cat medicines.

52Reports

40%Marked serious

27%Recovered

21%Died or euthanised

Same dayTypical onset

How soon it started

Same day

31 72%

1–2 days

6 14%

3–7 days

2 4.7%

1–4 weeks

3 7.0%

Over a month

1 2.3%

How the animals did

Recovered

13 25%

Recovered with lasting effects

1 1.9%

Still unwell when reported

8 15%

Died

4 7.7%

Euthanised

7 13%

Not known

19 37%

Problems reported at the same time

Behaviour change

18 35%

Restlessness or agitation

18 35%

17 33%

16 31%

13 25%

12 23%

9 17%

8 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 inappropriate urination in cats?: 52 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).

Inappropriate urination with similar medicines

Inappropriate urination after Imidacloprid + Moxidectin (Advantage Multi) 37 reports · 0.5% of its reports

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