Eye or vision problems after Robenacoxib (Onsior) in cats

The FDA has received 84 reports of eye or vision problems in cats after Robenacoxib. That is 2.6% of all reports for this medicine, compared with 2.3% across reports for all cat medicines.

84Reports
77%Marked serious
14%Recovered
23%Died or euthanised
1 daysTypical onset
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How soon it started

Same day
37 47%
1–2 days
20 25%
3–7 days
7 8.9%
1–4 weeks
11 14%
Over a month
4 5.1%

How the animals did

Recovered
11 13%
Recovered with lasting effects
1 1.2%
Still unwell when reported
37 44%
Died
6 7.1%
Euthanised
13 15%
Not known
16 19%

Problems reported at the same time

Age of the animals

Under 1 year
21
1–3 years
16
4–7 years
7
8–11 years
14
12+ years
25

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 eye or vision problems in cats?
84 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).

Eye or vision problems with similar medicines

All reported side effects of Robenacoxib in cats · Medicines most reported with eye or vision problems