Toceranib phosphate is primarily used in veterinary medicine for the treatment of certain types of cancer in dogs, particularly mast cell tumors. It functions as a tyrosine kinase inhibitor, which helps to impede the growth and spread of cancer cells by blocking specific enzymes that promote tumor development. This medication is often prescribed when surgical removal of the tumor is not feasible or when the cancer has metastasized. It can be administered orally, making it a convenient option for pet owners to manage their dog's treatment at home. Regular monitoring by a veterinarian is essential to assess the drug's effectiveness and to manage any potential side effects, such as gastrointestinal issues or changes in blood cell counts. Toceranib phosphate has shown promise in improving the quality of life and extending survival times in dogs with certain cancers.