Preparation of paeonol microemulsion gel and transdermal characterization in vitro Preparation and quality evaluation of tea tree oil microemulsion gel Comparative study on pharmacokinetics of six major alkaloids in Zuojin Wan microemulsion based gel and hydrogel Pharmacokinetics of bullatine A in Aconitum brachypodum total alkaloids gel in transdermal delivery Preparation of paeonol microemulsion gel its and transdermal characterization in vitro Pharmacokinetics of triptoLide in Triptergium wilfordii microemulsion gel