The development of multidrug resistance (MDR) to conventional therapy is one of the most important obstacles that lead to the failure of clinical chemotherapy in treating cancers and has become an extremely urgent one to overcome. Chinese materia medica which is capable of circumventing MDR with minimal adverse side effects

curative effects and multiple targets is an attractive resource library and has aroused more and more concern. Chinese materia medica has the activity to reverse the MDR of wide variety of tumors through mediatation in drug delivery system

drug metabolic system and promotion of apoptosis.