Pain after Robenacoxib (Onsior) in cats

The FDA has received 103 reports of pain in cats after Robenacoxib. That is 3.1% of all reports for this medicine, compared with 0.7% across reports for all cat medicines, so it is reported unusually often with this medicine.

103Reports

47%Marked serious

26%Recovered

11%Died or euthanised

3 daysTypical onset

How soon it started

Same day

20 21%

1–2 days

27 29%

3–7 days

19 20%

1–4 weeks

18 19%

Over a month

10 11%

How the animals did

Recovered

27 26%

Still unwell when reported

43 42%

Died

4 3.9%

Euthanised

7 6.8%

Not known

22 21%

Problems reported at the same time

55 53%

36 35%

19 18%

17 17%

Didn't work as expected

15 15%

Behaviour change

15 15%

Lameness

14 14%

Injection site reaction

13 13%

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 pain in cats?: 103 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 3 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).

Pain with similar medicines

Pain after Meloxicam (Metacam) 47 reports · 1.3% of its reports

All reported side effects of Robenacoxib in cats · Medicines most reported with pain