Not drinking after Robenacoxib (Onsior) in cats

The FDA has received 160 reports of not drinking in cats after Robenacoxib. That is 4.9% of all reports for this medicine, compared with 1.1% across reports for all cat medicines, so it is reported unusually often with this medicine.

160Reports

46%Marked serious

17%Recovered

24%Died or euthanised

1 daysTypical onset

How soon it started

Same day

55 38%

1–2 days

53 37%

3–7 days

18 13%

1–4 weeks

9 6.3%

Over a month

9 6.3%

How the animals did

Recovered

27 17%

Still unwell when reported

60 38%

Died

16 10%

Euthanised

23 14%

Not known

34 21%

Problems reported at the same time

145 91%

69 43%

39 24%

29 18%

29 18%

25 16%

21 13%

20 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 not drinking in cats?: 160 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).

Not drinking with similar medicines

Not drinking after Meloxicam (Metacam) 55 reports · 1.5% of its reports

All reported side effects of Robenacoxib in cats · Medicines most reported with not drinking