Preparation,Characterization and Transdermal Ability Study in vitro of Ibuprofen Nano-powder / 中国药房

ABSTRACT

OBJECTIVE:To prepare and characterize Ibuprofen (IBU) nano-powder,and to investigate its transdermal ability in vitro. METHODS:Using chloroform-ethanol(7:3,V/V)as organic phase,deionized water as aqueous phase and polysorbate 80 as surfactant,the emulsification method was used to prepare IBU nano-powder. Laser granulometric analysis,Fourier transform in-frared spectroscopy(FT-IR),X-ray diffraction(XRD),differential scanning calorimetry(DSC)were used to characterize IBU na-no-powder. IBU nano-powder was compared with bulk drug in respects of saturation solubility,dissolution rate and transdermal rate in vitro. RESULTS:The optimum condition was as follows that the concentration of polysorbate 80 was 5 mg/mL;the volume ra-tio of water phase-organic phase was 40:1;the concentration of IBU was 250 mg/mL;homogenate speed was 5000 r/min;homog-enate time was 2 min. Prepared IBU nano-powder was polyporous crumbly coralliform,and its chemical structure kept stable;the nano-powder changed from crystal to amorphous state;the particle size was 179.6 nm,and drug-loading amount was 8.99%;satu-ration solubility,dissolution rate and transdermal rate of IBU nano-powder were 148,1.23 and 4.08 times of bulk drug. CONCLU-SIONS:The prepared IBU nano-powder shows good water-solubility and percutaneous permeability.