Tremors after Robenacoxib (Onsior) in cats

62 reports to the FDA describe tremors in cats given Robenacoxib. That is 1.9% of all reports for this medicine, compared with 2.6% across reports for all cat medicines.

62Reports

79%Marked serious

23%Recovered

26%Died or euthanised

1 daysTypical onset

How soon it started

Same day

23 43%

1–2 days

17 31%

3–7 days

4 7.4%

1–4 weeks

7 13%

Over a month

3 5.6%

How the animals did

Recovered

13 21%

Recovered with lasting effects

1 1.6%

Still unwell when reported

22 35%

Died

7 11%

Euthanised

9 15%

Not known

10 16%

Problems reported at the same time

24 39%

20 32%

16 26%

13 21%

12 19%

10 16%

10 16%

10 16%

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 tremors in cats?: 62 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).

Tremors with similar medicines

Tremors after Meloxicam (Metacam) 50 reports · 1.4% of its reports

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