Diarrhea after Robenacoxib (Onsior) in cats

The FDA has received 185 reports of diarrhea in cats after Robenacoxib. That is 5.6% of all reports for this medicine, compared with 5.1% across reports for all cat medicines.

185Reports

53%Marked serious

30%Recovered

8.1%Died or euthanised

2 daysTypical onset

How soon it started

Same day

42 25%

1–2 days

71 42%

3–7 days

21 12%

1–4 weeks

21 12%

Over a month

16 9.4%

How the animals did

Recovered

56 30%

Still unwell when reported

81 44%

Died

7 3.8%

Euthanised

8 4.3%

Not known

33 18%

Problems reported at the same time

94 51%

79 43%

70 38%

25 14%

25 14%

21 11%

21 11%

20 11%

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 diarrhea in cats?: 185 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).

Diarrhea with similar medicines

Diarrhea after Meloxicam (Metacam) 254 reports · 7.0% of its reports
Diarrhea after Carprofen (Rimadyl) 56 reports · 3.3% of its reports

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