There are two specific medications available to treat mast cell tumors in dogs. They are in a class of drugs called tyrosine kinase inhibitors. The brand names of the drugs are Palladia and Kinavet-CA1. They are both oral prescription medications designed to treat grade II-III mast cell tumors. There are some strict warnings and handling instructions with these medications so they should only be administered to dogs that are under a veterinarian's care.