Olaparib (AZD2281, KU0059436) is a potent and orally active PARP inhibitor with IC50s of 5 and 1 nM for PARP1 and PARP2, respectively. Olaparib is an autophagy and mitophagy activator. Olaparib cannot cross the intact blood-brain barrier (BBB)[1][2][3][4][5][6].