“…Besides the potential role of HSP inhibition in overcoming the multidrug resistances, some groups focused their research on the development of strategies involving combination therapies, inhibition of the drug efflux pumps, and of ABC cassettes [7][8][9] . Combination therapies are more and more developed as standard of care for resistant cancers: example include RVD (Lenalidomide (immunomodulatory drug), Bortezomib (proteasome inhibitor), Dexamethasone (glucocorticoid)) for relapsed multiple myeloma, CAF (Cyclophosphamide, Adriamycin and fluorouracil) for metastatic breast cancer or BEP (Bleomycin, etoposide phosphate, cisplatin) for ovarian malignant cancer, … Several principles must be considered while setting up a strategy for combination therapies [10] .…”