Hyperproteinaemia after Robenacoxib (Onsior) in cats

50 reports to the FDA describe hyperproteinaemia in cats given Robenacoxib. That is 1.5% of all reports for this medicine, compared with 0.4% across reports for all cat medicines, so it is reported unusually often with this medicine.

50Reports

78%Marked serious

10%Recovered

18%Died or euthanised

2 daysTypical onset

How soon it started

Same day

10 22%

1–2 days

18 40%

3–7 days

7 16%

1–4 weeks

5 11%

Over a month

5 11%

How the animals did

Recovered

5 10%

Still unwell when reported

23 46%

Died

5 10%

Euthanised

4 8.0%

Not known

13 26%

Problems reported at the same time

34 68%

33 66%

25 50%

25 50%

18 36%

17 34%

17 34%

15 30%

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 hyperproteinaemia in cats?: 50 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).

Hyperproteinaemia with similar medicines

Hyperproteinaemia after Meloxicam (Metacam) 87 reports · 2.4% of its reports

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