“ Glycyrrhizae Radix , Rhei Rhizoma, Scutellariae Radix, Poria, Zizyphi Fructus, Zingiberis Rhizoma (dry), Coptidis Rhizoma, … Herba and Asiasari Radix significantly enhanced the sensitivity to a MDR1 substrate paclitaxel , whereas none of the herbal extracts used had any effect on … sensitivity to 5-fluorouracil, which is not a substrate for MDR1.”