Mucous stool after Nitenpyram (Capstar) in dogs

The FDA has received 22 reports of mucous stool in dogs after Nitenpyram. That is 0.2% of all reports for this medicine, compared with 0.2% across reports for all dog medicines.

22Reports
23%Marked serious
14%Recovered
9.1%Died or euthanised
2 daysTypical onset
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How soon it started

Same day
1 6.3%
1–2 days
10 63%
3–7 days
2 13%
1–4 weeks
1 6.3%
Over a month
2 13%

How the animals did

Recovered
3 14%
Still unwell when reported
4 18%
Euthanised
2 9.1%
Not known
13 59%

Problems reported at the same time

Age of the animals

Under 1 year
7
1–3 years
2
4–7 years
4
8–11 years
5
12+ years
2

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 mucous stool in dogs?
22 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 2 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).

Mucous stool with similar medicines

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