Intravesical therapy is treatment for bladder cancer that is applied directly into the bladder. It can be either immunotherapy or chemotherapy. The most common type of immunotherapy is BCG. BCG is immunotherapy that may be given with or without interferon.
Several chemotherapeutic agents are also available, including mitomycin C, thiotepa, doxorubicin, epirubicin, valrubicin, and others. These are all administered directly into the bladder through a catheter. The medications are then able to act on the surface of the bladder without exposing the rest of your body to potentially harmful medications.