Effects of salvianolic acid A on rat liver microsomal cytochrome P450 system Effect of Fuzheng Huayu recipe on CYP450 isozymes in normal and liver fibrosis rats Effects of components in Biqi Capsulae prescription compatibility on activities of cytochrome P450 in vivo Effects of coadministration of berberine hydrochloride and cyclosporine A on liver microsomal drug metabolizing enzymes in mice