Allergic reaction after Ilunocitinib (Zenrelia) in dogs

41 reports to the FDA describe allergic reaction in dogs given Ilunocitinib. That is 1.9% of all reports for this medicine, compared with 2.3% across reports for all dog medicines.

41Reports

39%Marked serious

32%Recovered

9.8%Died or euthanised

11 daysTypical onset

How soon it started

Same day

10 26%

1–2 days

5 13%

3–7 days

4 10%

1–4 weeks

6 15%

Over a month

14 36%

How the animals did

Recovered

13 32%

Still unwell when reported

17 41%

Died

4 9.8%

Not known

7 17%

Problems reported at the same time

13 32%

9 22%

7 17%

7 17%

4 9.8%

4 9.8%

4 9.8%

Pinnal reddening

3 7.3%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

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.

Questions owners ask

Can Ilunocitinib cause allergic reaction in dogs?: 41 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 11 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).

Allergic reaction with similar medicines

Allergic reaction after Oclacitinib (Apoquel) 664 reports · 2.3% of its reports
Allergic reaction after Cyclosporine (Atopica) 276 reports · 1.8% of its reports

All reported side effects of Ilunocitinib in dogs · Medicines most reported with allergic reaction