Venadaparib (IDX-1197) is a highly potent and selective oral PARP1/2 inhibitor, demonstrating IC50 values of 1.4 nM and 1.0 nM, respectively. It exhibits no activity against PARP-5. By blocking the repair of DNA single-strand breaks, this inhibitor is a valuable tool for investigating synthetic lethality in various solid tumor models, both in vitro and in vivo.