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  • Title: Speed of onset of a new chewable formulation of oclacitinib maleate (Apoquel®) in a canine model of IL-31-induced pruritus.
    Author: Fleck T, Norris L, King V, Lesman S, Gonzales AJ.
    Journal: J Vet Pharmacol Ther; 2022 Jul; 45(4):380-384. PubMed ID: 35586953.
    Abstract:
    Oclacitinib maleate (Apoquel®, Zoetis Inc.) is commonly used around the world for the control/treatment of pruritus associated with allergic dermatitis and the control/treatment of atopic dermatitis in dogs at least 12 months of age. A new flavored chewable formulation of oclacitinib has been developed where more than 90% of doses offered to dogs were freely accepted when tested in clinical trials. The objective of this study was to determine whether the new chewable formulation of oclacitinib has a similar onset of anti-pruritic activity as the original oclacitinib film-coated tablets (FCT). Twenty-one laboratory beagle dogs were randomized to treatment and received placebo, 0.4-0.6 mg/kg oclacitinib FCT or 0.4-0.6 mg/kg flavored chewable oclacitinib tablet (n = 7/group). Efficacy was measured by assessing reduction in pruritus 1-3 h post-administration of treatments. Pruritus was induced by injecting canine IL-31, intravenously (2.5 μg/kg), approximately 15 min prior to the pruritus observation window. Results from this study demonstrated both oclacitinib FCT and the flavored chewable oclacitinib tablet significantly reduced IL-31-induced pruritus within 1-3 h post-dosing compared to placebo (p = .0069 and .0113, respectively), suggesting the new formulation of oclacitinib chewable tablets works as quickly to reduce pruritus in dogs as the oclacitinib FCT.
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