Preparation of sinomenine hydrochloride?-carrageenan/konjac glucomannan matrix tablets and study on its in vitro release mechanism / 中草药

ABSTRACT

Objective To study the formulation and preparation factors influencing in vitro release mechanism of drug from?-carrageenan/konjac glucomannan hydrophilic matrix tablets.Methods The matrix tablets containing sinomenine hydrochloride as a model drug were obtained by direct compression method or wet granulation technique.The effects of the ratios of?-carrageenan/konjac glucomannan,the amount of matrix materials,the kinds of diluent agent,tablet size,preparation method,and compressing pressure on release mechanism of the matrix tablets were studied by evaluating the n value in the Peppas equation. Results The release mechanism of the matrix tablets was non-Fickian release that coupled diffusion and erosion modle.With a decrease in the ratio of?-carrageenan/konjac glucomannan,a decrease in the amount of matrix materials,a decrease in the water-solubility of diluent agents,an increase in tablet size,and a decrease in compressing pressure,the ratio of drug diffusion was increased.Preparation method had little influence on drug release mechanism.Conclusion Drug could be slowly released from the matrix tablets containing?-carrageenan/konjac glucomannan as matrix material,the main factors influencing drug release mechanism are the ratio of?-carrageenan/konjac glucomannan,the amount of matrix materials, the kinds of diluent agent,tablet size,and compressing pressure.