Balversa Erdafitinib 4mg Tablets is used to treat bladder cancer. Erdafitinib belongs to a class of drugs known as kinase inhibitors. It works by slowing or stopping the growth of cancer cells that have a certain type of abnormal gene ("FGFR"). Balversa Erdafitinib 4mg Tablets is a prescription medicine used to treat the symptoms of Bladder Cancer (Urothelial Carcinoma). Balversa may be used alone or with other medications.