Berbamine, a novel NF-κB inhibitor, inhibits growth and induces apoptosis in human myeloma cells. Berbamine treatment leads to increased expression of A20, down-regulation of IKKα, p-IκBα, and follows by inhibition of p65 nuclear localization. As a result, NF-κB downstream targets such as cyclin D1, Bcl-xL, Bid and survivin are down-regulated. To determine whether Berbamine has growth inhibitory effect on myeloma cells, KM3 cells are treated with Berbamine at various concentrations for 24, 48, and 72 h, respectively, and then cell viability is assessed by MTT assays. Berbamine inhibits the growth of KM3 cells in a dose- and time-dependent manner, and the IC50 values are 8.17 μg/mL, 5.09 μg/mL, and 3.84 μg/mL for treatment of 24, 48, and 72 h, respectively. In contrast, IC50 value of Berbamine for normal hematopoietic cells is 185.20 μg/mL at 48 h.