Hyperglycaemia after Robenacoxib (Onsior) in cats

The FDA has received 125 reports of hyperglycaemia in cats after Robenacoxib. That is 3.8% of all reports for this medicine, compared with 1.9% across reports for all cat medicines, so it is reported unusually often with this medicine.

125Reports
81%Marked serious
15%Recovered
31%Died or euthanised
2 daysTypical onset
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How soon it started

Same day
26 24%
1–2 days
31 29%
3–7 days
20 19%
1–4 weeks
14 13%
Over a month
16 15%

How the animals did

Recovered
19 15%
Still unwell when reported
44 35%
Died
18 14%
Euthanised
21 17%
Not known
23 18%

Problems reported at the same time

Age of the animals

Under 1 year
13
1–3 years
20
4–7 years
27
8–11 years
38
12+ years
26

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 hyperglycaemia in cats?
125 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).

Hyperglycaemia with similar medicines

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