Swelling after Nitenpyram (Capstar) in dogs

127 reports to the FDA describe swelling in dogs given Nitenpyram. That is 1.2% of all reports for this medicine, compared with 2.8% across reports for all dog medicines, so it is reported less often than average with this medicine.

127Reports

31%Marked serious

20%Recovered

8.7%Died or euthanised

Same dayTypical onset

How soon it started

Same day

39 56%

1–2 days

16 23%

3–7 days

4 5.7%

1–4 weeks

6 8.6%

Over a month

5 7.1%

How the animals did

Recovered

25 20%

Still unwell when reported

21 17%

Died

11 8.7%

Not known

70 55%

Problems reported at the same time

54 43%

30 24%

29 23%

23 18%

14 11%

14 11%

13 10%

13 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 swelling in dogs?: 127 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).

Swelling with similar medicines

Swelling after Spinosad (Comfortis) 399 reports · 0.7% of its reports
Swelling after Lufenuron + Milbemycin Oxime (Sentinel) 219 reports · 0.8% of its reports
Swelling after Imidacloprid + Moxidectin (Advantage Multi) 218 reports · 1.7% of its reports
Swelling after Lufenuron + Milbemycin Oxime + Praziquantel (Sentinel Spectrum) 70 reports · 0.7% of its reports
Swelling after Fipronil + S-methoprene (Frontline Plus) 42 reports · 1.4% of its reports
Swelling after Flumethrin + Imidacloprid (Seresto) 47 reports · 2.1% of its reports
Swelling after Fipronil 20 reports · 1.4% of its reports
Swelling after Lufenuron 44 reports · 4.3% of its reports

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