Tremors after Nitenpyram (Capstar) in dogs

402 reports to the FDA describe tremors in dogs given Nitenpyram. That is 3.7% of all reports for this medicine, compared with 3.4% across reports for all dog medicines.

402Reports

28%Marked serious

27%Recovered

7.2%Died or euthanised

Same dayTypical onset

How soon it started

Same day

143 51%

1–2 days

76 27%

3–7 days

20 7.1%

1–4 weeks

20 7.1%

Over a month

24 8.5%

How the animals did

Recovered

105 26%

Recovered with lasting effects

5 1.2%

Still unwell when reported

91 23%

Died

21 5.2%

Euthanised

8 2.0%

Not known

172 43%

Problems reported at the same time

141 35%

100 25%

94 23%

73 18%

63 16%

59 15%

53 13%

43 11%

Age of the animals

Under 1 year

1–3 years

108

4–7 years

107

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 tremors in dogs?: 402 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).

Tremors with similar medicines

Tremors after Spinosad (Comfortis) 2,268 reports · 4.0% of its reports
Tremors after Lufenuron + Milbemycin Oxime (Sentinel) 590 reports · 2.3% of its reports
Tremors after Imidacloprid + Moxidectin (Advantage Multi) 837 reports · 6.4% of its reports
Tremors after Lufenuron + Milbemycin Oxime + Praziquantel (Sentinel Spectrum) 213 reports · 2.1% of its reports
Tremors after Fipronil + S-methoprene (Frontline Plus) 141 reports · 4.8% of its reports
Tremors after Flumethrin + Imidacloprid (Seresto) 66 reports · 2.9% of its reports
Tremors after Imidacloprid 58 reports · 3.0% of its reports
Tremors after Fipronil 65 reports · 4.6% of its reports
Tremors after Lufenuron 33 reports · 3.2% of its reports
Tremors after Imidacloprid + Permethrin + Pyriproxyfen 35 reports · 4.7% of its reports

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