Ilunocitinib (Zenrelia) side effects in dogs
2,198 reports sent to the FDA between 2022 and 2026 involve Ilunocitinib in dogs. The most reported problems were lethargy, vomiting, liver problems. 23% were marked serious, and where it was recorded, signs eased after stopping the medicine in 100% of cases.
About this medicine
Ilunocitinib controls itching from allergies (tablet, a JAK inhibitor).
Products with this ingredient include Zenrelia. The FDA hides brand names in its public data, so these reports cover every product with the same active ingredients.
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 dog 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 (1,914 reports).
How the animals did
Breeds named most often
Popular breeds appear more often because there are more of them.
- Labrador Retriever 193 reports
- German Shepherd Dog 95 reports
- French Bulldog 89 reports
- Golden Retriever 89 reports
- Pit Bull 75 reports
- English Bulldog 55 reports
- Shih Tzu 52 reports
- Boxer (german Boxer) 28 reports
- Australian Shepherd Dog 27 reports
- American Bulldog 26 reports