Loss of appetite after Nitenpyram (Capstar) in dogs

807 reports to the FDA describe loss of appetite in dogs given Nitenpyram. That is 7.5% of all reports for this medicine, compared with 8.4% across reports for all dog medicines.

807Reports
27%Marked serious
19%Recovered
11%Died or euthanised
1 daysTypical onset
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How soon it started

Same day
194 36%
1–2 days
206 38%
3–7 days
59 11%
1–4 weeks
41 7.6%
Over a month
41 7.6%

How the animals did

Recovered
151 19%
Recovered with lasting effects
3 0.4%
Still unwell when reported
185 23%
Died
67 8.3%
Euthanised
21 2.6%
Not known
380 47%

Problems reported at the same time

458 57%
334 41%
197 24%
94 12%
86 11%
77 9.5%

Age of the animals

Under 1 year
149
1–3 years
194
4–7 years
206
8–11 years
136
12+ years
98

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 loss of appetite in dogs?
807 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).

Loss of appetite with similar medicines

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