Didn't work as expected after Robenacoxib (Onsior) in cats

369 reports to the FDA describe didn't work as expected in cats given Robenacoxib. That is 11% of all reports for this medicine, compared with 8.7% across reports for all cat medicines.

369Reports

44%Marked serious

4.6%Recovered

7.0%Died or euthanised

2 daysTypical onset

How soon it started

Same day

52 16%

1–2 days

111 35%

3–7 days

67 21%

1–4 weeks

49 15%

Over a month

42 13%

How the animals did

Recovered

17 4.6%

Still unwell when reported

100 27%

Died

13 3.5%

Euthanised

13 3.5%

Not known

226 61%

Problems reported at the same time

71 19%

58 16%

37 10%

27 7.3%

25 6.8%

22 6.0%

21 5.7%

21 5.7%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

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 didn't work as expected in cats?: 369 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).

Didn't work as expected with similar medicines

Didn't work as expected after Meloxicam (Metacam) 88 reports · 2.4% of its reports

All reported side effects of Robenacoxib in cats · Medicines most reported with didn't work as expected