PGP and colorectal carcinoma: miltiorrhiza, C. longa, S. acutum, S. tetrandra, B. gargarizans, C. japonica, P. nigrum and P. longum, H. diffusa, S. chinensis, G. glabra, G. inflate and D. genkwa, S. tuberosa Lour, and A. paniculata— that have been demonstrated to alter P-gp-mediated drug efflux in CRC.