Robenacoxib (Onsior) side effects in cats
3,276 reports sent to the FDA between 2011 and 2026 involve Robenacoxib in cats. The most reported problems were loss of appetite, lethargy, fever. 48% were marked serious, and where it was recorded, signs eased after stopping the medicine in 31% of cases.
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.
Most reported side effects
Share = percentage of this medicine's reports that mention the problem. One report can list several problems.
Reports that it didn't work
Some reports are about the medicine not working (for example a cat still getting fleas or heartworm), not about a side effect.
How soon problems started
Time from the first dose to the first sign, where both dates were reported (2,955 reports).
How the animals did
Breeds named most often
Popular breeds appear more often because there are more of them.
- Domestic Shorthair 1,892 reports
- Domestic Longhair 225 reports
- Domestic Mediumhair 198 reports
- Domestic 67 reports
- Maine Coon 60 reports
- Siamese 59 reports
- Cat (other) 47 reports
- Ragdoll 33 reports
- Persian 29 reports
- Bengal 25 reports