Prednisone is an immunosuppressant drug that works by suppressing your dog’s immune system and reducing inflammation throughout the body. This makes it useful as a treatment for many different types of cancer because it slows down the growth rate at which tumors grow, which can help keep them from spreading or becoming more aggressive. Because it also reduces inflammation in the body, prednisone can help reduce pain associated with cancers like mast cell tumors and lymphoma.
It’s important to note that while prednisone can be very helpful in slowing down tumor growth or reducing pain associated with certain cancers, it won’t cure them—it will only suppress their growth rate so they don’t get worse over time (or stop growing altogether). This means that you’ll still need further treatment options.