Weight loss after Nitenpyram (Capstar) in dogs

89 reports to the FDA describe weight loss in dogs given Nitenpyram. That is 0.8% of all reports for this medicine, compared with 1.7% across reports for all dog medicines, so it is reported less often than average with this medicine.

89Reports

48%Marked serious

12%Recovered

24%Died or euthanised

1 daysTypical onset

How soon it started

Same day

18 26%

1–2 days

26 38%

3–7 days

5 7.2%

1–4 weeks

11 16%

Over a month

9 13%

How the animals did

Recovered

10 11%

Recovered with lasting effects

1 1.1%

Still unwell when reported

13 15%

Died

12 13%

Euthanised

9 10%

Not known

44 49%

Problems reported at the same time

50 56%

31 35%

30 34%

22 25%

20 22%

18 20%

16 18%

11 12%

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 weight loss in dogs?: 89 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 1 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).

Weight loss with similar medicines

Weight loss after Spinosad (Comfortis) 531 reports · 0.9% of its reports
Weight loss after Lufenuron + Milbemycin Oxime (Sentinel) 280 reports · 1.1% of its reports
Weight loss after Imidacloprid + Moxidectin (Advantage Multi) 236 reports · 1.8% of its reports
Weight loss after Lufenuron + Milbemycin Oxime + Praziquantel (Sentinel Spectrum) 77 reports · 0.8% of its reports
Weight loss after Fipronil + S-methoprene (Frontline Plus) 29 reports · 1.0% of its reports
Weight loss after Flumethrin + Imidacloprid (Seresto) 57 reports · 2.5% of its reports
Weight loss after Fipronil 28 reports · 2.0% of its reports

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