Didn't stop ticks after Nitenpyram (Capstar) in dogs

The FDA has received 51 reports of didn't stop ticks in dogs after Nitenpyram. That is 0.5% of all reports for this medicine, compared with 2.3% across reports for all dog medicines, so it is reported less often than average with this medicine.

51Reports

3.9%Marked serious

0.0%Recovered

0.0%Died or euthanised

5 daysTypical onset

How soon it started

Same day

7 17%

1–2 days

11 26%

3–7 days

8 19%

1–4 weeks

12 29%

Over a month

4 9.5%

How the animals did

Still unwell when reported

3 5.9%

Not known

48 94%

Problems reported at the same time

Didn't stop fleas

25 49%

Disorientation

5 9.8%

Drug administration error

2 3.9%

2 3.9%

1 2.0%

1 2.0%

1 2.0%

1 2.0%

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 didn't stop ticks in dogs?: 51 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 5 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).

Didn't stop ticks with similar medicines

Didn't stop ticks after Spinosad (Comfortis) 95 reports · 0.2% of its reports
Didn't stop ticks after Lufenuron + Milbemycin Oxime (Sentinel) 42 reports · 0.2% of its reports
Didn't stop ticks after Imidacloprid + Moxidectin (Advantage Multi) 52 reports · 0.4% of its reports
Didn't stop ticks after Lufenuron + Milbemycin Oxime + Praziquantel (Sentinel Spectrum) 36 reports · 0.4% of its reports
Didn't stop ticks after Fipronil + S-methoprene (Frontline Plus) 117 reports · 4.0% of its reports
Didn't stop ticks after Flumethrin + Imidacloprid (Seresto) 158 reports · 7.0% of its reports
Didn't stop ticks after Imidacloprid + Permethrin + Pyriproxyfen 21 reports · 2.8% of its reports
Didn't stop ticks after Fipronil + Pyriproxyfen + S-methoprene 33 reports · 7.7% of its reports

All reported side effects of Nitenpyram in dogs · Medicines most reported with didn't stop ticks