Disorientation after Nitenpyram (Capstar) in dogs

183 reports to the FDA describe disorientation in dogs given Nitenpyram. That is 1.7% of all reports for this medicine, compared with 1.0% across reports for all dog medicines, so it is reported unusually often with this medicine.

183Reports

19%Marked serious

9.8%Recovered

4.4%Died or euthanised

Same dayTypical onset

How soon it started

Same day

71 55%

1–2 days

31 24%

3–7 days

10 7.8%

1–4 weeks

10 7.8%

Over a month

7 5.4%

How the animals did

Recovered

17 9.3%

Recovered with lasting effects

1 0.5%

Still unwell when reported

17 9.3%

Died

3 1.6%

Euthanised

5 2.7%

Not known

140 77%

Problems reported at the same time

98 54%

70 38%

31 17%

21 11%

20 11%

20 11%

18 9.8%

17 9.3%

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 disorientation in dogs?: 183 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).

Disorientation with similar medicines

Disorientation after Spinosad (Comfortis) 497 reports · 0.9% of its reports
Disorientation after Lufenuron + Milbemycin Oxime (Sentinel) 154 reports · 0.6% of its reports
Disorientation after Imidacloprid + Moxidectin (Advantage Multi) 182 reports · 1.4% of its reports
Disorientation after Lufenuron + Milbemycin Oxime + Praziquantel (Sentinel Spectrum) 67 reports · 0.7% of its reports
Disorientation after Fipronil + S-methoprene (Frontline Plus) 34 reports · 1.2% of its reports
Disorientation after Imidacloprid 23 reports · 1.2% of its reports
Disorientation after Fipronil 24 reports · 1.7% of its reports

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