Niraparib in the treatment of previously treated advanced ovarian, fallopian tube or primary peritoneal cancer.

Homologous recombination deficiency is a critical biologic feature of ovarian cancer. This weakness in DNA damage repair relies on functional poly(ADP-ribose) polymerase. Niraparib is a poly(ADP-ribose) polymerase inhibitor, orally available and initially approved for maintenance therapy in women with ovarian cancer by the US FDA in 2017 and by the EMA in 2017 for the same indication. Ovarian cancer represents the most lethal of gynecologic malignancies. The efficacy of niraparib has changed the landscape of ovarian cancer treatment, but overall survival data is still to come. This review summarizes the data regarding niraparib mechanism of action, toxicities, single agent efficacy and novel combinations in ovarian cancer.