In vitro transdermal delivery of Qingfei Xiaocuo gel based on principal component analysis Transdermal permeation in vitro of Xiaoyan Zhentong Cataplasm Effect of different penetration enhancers on percutaneous absorption of active components groups in Shaofu Zhuyu Transdermal Patches Effects of penetration enhancers on in vitro transdermal permeation of components from total flavones in Scutellariae Radix Gel-unguentum Investigation on preparation of sinomenine hydrochloride ethosomes and its properties Development and evaluation of terpene penetration enhancers Effects of different penetration enhancers on percutaneous absorption of lappaconitine gel in vitro Effects of Volatile oil of Rhizoma Zingiberis and other two kinds of volatile oil on percutaneous penetration of Bullatine A via hairless mouse skin in vitro Current situation and future outlook on essential oils from Chinese materia medica as penetration enhancers Effects of penetration enhancers on percutaneous permeability of geniposide in Xiao‘er Niuhuang tuire cataplasms Transdermal permeation in vitro of Xiaoyan Zhentong Cataplasm Screening of Enhancers for Permeation of Berberine in Ruyi Patcher in Vitro Influence of penetration enhancers on in vitro transdermal permeation of L-tethrahydropalmatine Investigation on preparation of sinomenine hydrochloride ethosomes and its properties