7. Chronic use of known strong CYP3A4 inhibitors (e.g. ketoconazole, itraconazole, ritonavir, indinavir, saquinavir, telithromycin, clarithromycin, voriconazole, nefazodone, posaconazole, ritonavir, lopinavir/ritonavir, indinavir, saquinavir, boceprevir, telaprevir and nelfinavir), moderate CYP3A4 inhibitors (e.g. amprenavir, aprepitant, atazanavir, ciprofloxacin, crizotinib, darunavir/ritonavir, diltiazem, erythromycin, fluconazole, fosamprenavir, imatinib, verapamil), strong CYP3A4 inducers (e.g. phenytoin, rifampicin, carbamazepine, St.John's Wort, phenobarbital) and moderate CYP3A4 inducers (e.g. bosentan, efavirenz, etravirine, modafinil and nafcillin). Concomitant use of these drugs with olaparib is not allowed. Patients may undergo limited courses of them prior to starting olaparib but will be required to have >/= 5 week washout period from phenobarbital, and >/=3 week washout period from the rest, before initiating treatment with olaparib.