Effects of salvianolic acid A on rat liver microsomal cytochrome P450 system Effect of Qingkailing injection on rat CYP1A2 and CYP2D6 activity Study on inhibitory effect of water extract of Polygonum multiflorum on CYP1A2 and CYP2E1 enzymatic activities and mRNA expressions in rat liver Preliminary study on hepatotoxicity induced by dioscin and its possible mechanism Effect of water extract from traditional Chinese medicines Rehmannia glutinosa, Scrophularia ningpoensis, Asparagus cochinchinensis and Ophiopogon japonicas on contents of CYP450 and activities of CYP3A,CYP2E1 and CYP1A2 in rat Effect of Shenmai Iniection on isoforms of cytochrome P450 enzymes in rats