Durvalumab (IMFINZI) is FDA approved immunotherapy that blocks PD-L1 Durvalumab is a human immunoglobulin G1 kappa (IgG1κ) monoclonal antibody that blocks the interaction of programmed cell death ligand 1 (PD-L1) with the PD-1 and CD80 (B7.1) molecules. Durvalumab is produced by recombinant DNA technology in Chinese Hamster Ovary (CHO) cell suspension culture. Indication of Durvalumab (IMFINZI) IMFINZI is a programmed death-ligand 1 (PD-L1) blocking antibody indicated for the treatment of patients with: Locally advanced or metastatic urothelial carcinoma who: have disease progression during or following platinum-containing chemotherapy. have disease progression within 12 months of neoadjuvant or adjuvant treatment with platinum-containing chemotherapy. This indication is approved under accelerated approval based on tumor response rate and duration of response. Continued approval for this indication may be contingent upon verification and description of clinic...