VETINUITY
Which active ingredients are being compared?
Zenrelia contains ilunocitinib and Apoquel contains oclacitinib; both labels address allergic pruritus and atopic dermatitis in dogs, with different administration schedules and warnings.
● ANSWER
Sourced & dated
How do Zenrelia and Apoquel differ?
Zenrelia contains ilunocitinib and Apoquel contains oclacitinib; both labels address allergic pruritus and atopic dermatitis in dogs, with different administration schedules and warnings.
● WHAT'S DOCUMENTED
Compare the actual labels
Zenrelia uses once-daily administration from the start, while Apoquel transitions from an initial twice-daily schedule to daily maintenance.
The Zenrelia label includes a boxed warning about inadequate vaccine response. Review its vaccination instructions, contraindications and precautions for the particular dog.
Interpret the head-to-head trial
The published randomized blinded comparison supports ilunocitinib’s noninferiority to oclacitinib for the studied pruritus endpoint.
Group-level trial results do not identify the best choice for every dog; the discussion also describes limitations of later follow-up and secondary analyses.
Related reading
● SOURCES
- 1. Zenrelia label. Indications; Boxed Warning; Dosage and Administration. Checked 2026-10-23.
- 2. Apoquel label. Indications; Dosage and Administration; Warnings. Checked 2026-10-23.
- 3. Forster et al., Veterinary Dermatology, comparative trial. Abstract; Materials and Methods; Discussion limitations. Checked 2026-10-23.
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Vetinuity explains clinical options with journal citations.
The veterinarian diagnoses and prescribes.