Venadaparib, a novel poly (ADP‐ribose) polymerase (PARP) inhibitor, has demonstrated high PARP‐1/2 selectivity over other PARP family members and exhibited strong PARP‐trapping activity, effectively inhibiting tumor growth in homologous recombination deficient (HRD) cancer in vitro and in vivo. This evidence concerns the gene PARP1 and cancer.