Oclacitinib is primarily used in veterinary medicine to treat allergic dermatitis and atopic dermatitis in dogs. It works by inhibiting specific enzymes involved in the inflammatory response, providing relief from itching and skin irritation. This medication is particularly effective in managing chronic skin conditions, improving the quality of life for affected animals. It is administered orally and is often preferred for its rapid onset of action, with noticeable improvement in symptoms within a short period. Veterinarians may prescribe it as part of a comprehensive treatment plan, which may include other therapies to address underlying causes or secondary infections.