#$%^&*AU2015101288A420151022.pdf#####USE OF TANGERETIN IN CANCER TREATMENT ABSTRACT The present invention discloses a pharmaceutical composition of treating multidrug resistance cancer, comprising a citrus methoxyflavone and a chemotherapeutic drug, in which the citrus methoxyflavone is tangeretin. A method of treating multidrug resistance cancer comprising administrating citrus methoxyflavone and a chemotherapeutic drug is also disclosed. <;DocRef#00150677-RM >; M006.043.DRF 28 Spec Draft Final