It is an immunology IV drug. Generic name is Pembrolizumab. As I understand it, this drug therapy is indicated only if BCG therapy has failed. It is a fairly new drug and has found use for a number of different cancer types: Skin, Hodgkin's lymphoma, lung, head and neck, gastric, esophageal, bladder, colorectal, endometrial, cervical, liver, breast, and kidney, and "may be used for other treatments". For bladder cancer it is specific to "high-risk, non-muscle invasive bladder cancer {NMIBC} and when...it is a type called "carcinoma in situ (CIS)". Another, Anktiva, I don't understand much, but apparently is used WITH BCG with the same intravesical injections to enhance the effectiveness of BCG. I've had to find this out on my own as it has not been mentioned but any of my doctors.