Loss of appetite after Robenacoxib (Onsior) in cats

963 reports to the FDA describe loss of appetite in cats given Robenacoxib. That is 29% of all reports for this medicine, compared with 14% across reports for all cat medicines, so it is reported unusually often with this medicine.

963Reports
56%Marked serious
26%Recovered
18%Died or euthanised
1 daysTypical onset
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How soon it started

Same day
257 29%
1–2 days
303 35%
3–7 days
137 16%
1–4 weeks
111 13%
Over a month
70 8.0%

How the animals did

Recovered
248 26%
Recovered with lasting effects
2 0.2%
Still unwell when reported
370 38%
Died
74 7.7%
Euthanised
103 11%
Not known
166 17%

Problems reported at the same time

441 46%
192 20%
191 20%
177 18%

Age of the animals

Under 1 year
145
1–3 years
172
4–7 years
200
8–11 years
232
12+ years
187

About this medicine

Robenacoxib relieves pain and inflammation (short courses).

Products with this ingredient include Onsior. The FDA hides brand names in its public data, so these reports cover every product with the same active ingredients.

NSAIDs can affect the stomach, liver and kidneys. Vets usually recommend blood tests before and during long-term use.

Questions owners ask

Can Robenacoxib cause loss of appetite in cats?
963 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 Robenacoxib in cats · Medicines most reported with loss of appetite