Seizures after Robenacoxib (Onsior) in cats

113 reports to the FDA describe seizures in cats given Robenacoxib. That is 3.4% of all reports for this medicine, compared with 2.6% across reports for all cat medicines.

113Reports

98%Marked serious

23%Recovered

45%Died or euthanised

1 daysTypical onset

How soon it started

Same day

49 47%

1–2 days

28 27%

3–7 days

12 12%

1–4 weeks

6 5.8%

Over a month

9 8.7%

How the animals did

Recovered

26 23%

Still unwell when reported

23 20%

Died

28 25%

Euthanised

23 20%

Not known

13 12%

Problems reported at the same time

50 44%

24 21%

23 20%

17 15%

14 12%

14 12%

14 12%

13 12%

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 seizures in cats?: 113 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).

Seizures with similar medicines

Seizures after Meloxicam (Metacam) 103 reports · 2.8% of its reports

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