Correlation between in vivo pharmacodynamics and pharmacokinetics of berberine in Huanglian Jiedu Decoction used for rats with cerebral ischemia Effects of Tongfu Xingshen Capsula on expression of sodium channel genes in rats with acute ischemic brain injury Correlation between in vivo pharmacodynamics and pharmacokinetics of berberine in Huanglian Jiedu Decoction used for rats with cerebral ischemia