Just days after Clovis Oncology Inc.'s Rubraca (rucaparib) became the first PARP inhibitor approved by the FDA to treat certain cases of metastatic prostate cancer (mCPRC) in third-line care, the agency granted an even broader label in the indication to its first-in-class competitor, Lynparza (olaparib). Endorsement of second-line use of Lynparza in mCPRC and an overall survival (OS) benefit listed in its updated label will help rapidly establish it as "the drug of choice in the [second] line, leaving little commercial opportunities for Rubraca downstream," SVB Leerink analyst Andrew Berens said.