title: [Studies on screening of matrix and permeation enhancer of sustained-release patches of duliang].
abstract: OBJECTIVE
  To screen the matrix and permeation enhancer of Duliang Patches.
  
  
  METHODS
  Based on L9 (3(4)) orthogonal experimental design, the content of imperatorin of the release rate and transdermal osmolality were regarded as evaluation indexes to optimize the matrix and permeation enhancer of patches suing of Drug dissolution tester and Franz diffusion cell.
  
  
  RESULTS
  The best prescriplion of sustained-release patch of Duliang was: the quality percentage content of the starch, sodium carboxymethyl cellulose, glycerin, azone, propylene glycol and PEG400 was 6%, 2%, 30%, 1%, 15% and 2.5% respectively. The release behavior of sustained-release patches of Duliang tallied with Higuchi equation and the effect of sustained-release was apparent.
  
  
  CONCLUSIONS
  The sustained-release patches of Duliang have good property of sustained-release and transdermal in vitro and the stability of patches is also sound while the release in vivo awaits further inspection.
authors.forename: Qian
authors.initials: Q
authors.lastname: Rao
authors.forename: Yu
authors.initials: Y
authors.lastname: Lin
authors.forename: Xin
authors.initials: X
authors.lastname: Liu
authors.forename: Lian-Ju
authors.initials: LJ
authors.lastname: Ma
authors.forename: Fang-Fang
authors.initials: FF
authors.lastname: Sheng
authors.forename: Ke
authors.initials: K
authors.lastname: Xiao
mesh_terms: D000818:Animals; D002266:Carboxymethylcellulose Sodium / Q000008:administration & dosage* / Q000737:chemistry; D002626:Chemistry, Pharmaceutical; D003692:Delayed-Action Preparations; D004365:Drugs, Chinese Herbal / Q000008:administration & dosage / Q000737:chemistry* / Q000493:pharmacokinetics*; D011564:Furocoumarins / Q000032:analysis; D005990:Glycerol / Q000008:administration & dosage* / Q000737:chemistry; D008297:Male; D051379:Mice; D010946:Plants, Medicinal / Q000737:chemistry; D019946:Propylene Glycol / Q000008:administration & dosage / Q000737:chemistry; D012867:Skin / Q000378:metabolism*; D012869:Skin Absorption; D012995:Solubility; D057968:Transdermal Patch
chemical_list: D003692:Delayed-Action Preparations; D004365:Drugs, Chinese Herbal; D011564:Furocoumarins; D019946:Propylene Glycol; D002266:Carboxymethylcellulose Sodium; C031534:imperatorin; D005990:Glycerol