Skin and/or appendage neoplasm after Oclacitinib (Apoquel) in dogs

137 reports to the FDA describe skin and/or appendage neoplasm in dogs given Oclacitinib. That is 0.5% of all reports for this medicine, compared with 0.0% across reports for all dog medicines, so it is reported unusually often with this medicine.

137Reports
88%Marked serious
17%Recovered
8.8%Died or euthanised
107 daysTypical onset
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How soon it started

Same day
5 5.7%
1–2 days
0 0.0%
3–7 days
2 2.3%
1–4 weeks
12 14%
Over a month
68 78%

How the animals did

Recovered
22 16%
Recovered with lasting effects
1 0.7%
Still unwell when reported
91 66%
Died
4 2.9%
Euthanised
8 5.8%
Not known
11 8.0%

Problems reported at the same time

Age of the animals

Under 1 year
0
1–3 years
15
4–7 years
41
8–11 years
57
12+ years
19

About this medicine

Oclacitinib controls itching from allergies (tablet, a JAK inhibitor).

Products with this ingredient include Apoquel. The FDA hides brand names in its public data, so these reports cover every product with the same active ingredients.

Questions owners ask

Can Oclacitinib cause skin and/or appendage neoplasm in dogs?
137 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 107 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).

Skin and/or appendage neoplasm with similar medicines

All reported side effects of Oclacitinib in dogs · Medicines most reported with skin and/or appendage neoplasm