Digestive tract disorder after Nitenpyram (Capstar) in dogs

The FDA has received 30 reports of digestive tract disorder in dogs after Nitenpyram. That is 0.3% of all reports for this medicine, compared with 2.0% across reports for all dog medicines, so it is reported less often than average with this medicine.

30Reports

23%Marked serious

13%Recovered

10%Died or euthanised

2 daysTypical onset

How soon it started

Same day

4 31%

1–2 days

3 23%

3–7 days

3 23%

1–4 weeks

0 0.0%

Over a month

3 23%

How the animals did

Recovered

4 13%

Still unwell when reported

4 13%

Died

2 6.7%

Euthanised

1 3.3%

Not known

19 63%

Problems reported at the same time

16 53%

12 40%

8 27%

7 23%

3 10%

3 10%

3 10%

3 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 digestive tract disorder in dogs?: 30 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 2 days 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).

Digestive tract disorder with similar medicines

Digestive tract disorder after Spinosad (Comfortis) 141 reports · 0.2% of its reports
Digestive tract disorder after Lufenuron + Milbemycin Oxime (Sentinel) 108 reports · 0.4% of its reports
Digestive tract disorder after Imidacloprid + Moxidectin (Advantage Multi) 46 reports · 0.4% of its reports
Digestive tract disorder after Lufenuron + Milbemycin Oxime + Praziquantel (Sentinel Spectrum) 33 reports · 0.3% of its reports
Digestive tract disorder after Fipronil + S-methoprene (Frontline Plus) 27 reports · 0.9% of its reports

All reported side effects of Nitenpyram in dogs · Medicines most reported with digestive tract disorder