title: [Preparation and in vitro release of Maiyanning sustained-release patches].
abstract: OBJECTIVE
  To prepare Maiyanning sustained-release patches and optimize the prescription.
  
  
  METHODS
  The mono-factor design was used to screen the formulation of the sustained-release patches.
  
  
  RESULTS
  The optimal composition of the formulation was MD-607 as the pressure sensitive adhesive and azone as the penetration enhancer with the content of 5.0%. Drugs released from the pressure-sensitive adhesive patches in a constant speed, it confirmed that the drug was released by zero order equation from the patches.
  
  
  CONCLUSIONS
  The prepared patches have an ideal release trait.
authors.affiliation: Pharmaceutical Department, Beijing Uinversity of Chinese Medicine, Beijing 100102, China.
authors.forename: Sumin
authors.initials: S
authors.lastname: Yuan
authors.forename: Jian
authors.initials: J
authors.lastname: Ni
mesh_terms: D002626:Chemistry, Pharmaceutical; D004304:Dosage Forms; D004365:Drugs, Chinese Herbal / Q000737:chemistry*; D007700:Kinetics; D012995:Solubility
chemical_list: D004304:Dosage Forms; D004365:Drugs, Chinese Herbal