Case Report: Clinical manifestations reported in a canine after ingesting ruxolitinib phosphate (Opzelura®)

This case report describes a canine patient that developed cardiovascular and ocular abnormalities following ingestion of ruxolitinib phosphate 1.5% topical cream. The objective of this report is to characterize the exposure history, clinical presentation, diagnostic findings, therapeutic interventions, and to evaluate ruxolitinib phosphate within the context of its pharmacologic class, emphasizing similarities with related veterinary medications. Building on a recently published retrospective study of oclacitinib maleate overdoses, this case highlights shared clinical manifestations of ruxolitinib phosphate overdose and contributes to a broader understanding of JAK inhibitor toxicosis in veterinary medicine.