The objective of this study was to develop once-daily metformin hydrochloride sustained-release tablets (MHSRT) and evaluate their in vitro release behavior. MHSRT were prepared by the film coating method. The in vitr...The objective of this study was to develop once-daily metformin hydrochloride sustained-release tablets (MHSRT) and evaluate their in vitro release behavior. MHSRT were prepared by the film coating method. The in vitro drug release rate of MHSRT and the commercial tablets Fortamet? made in the United States of America in water was fitted with zero order kinetic equation, and Ritger-Peppas kinetic equation in 0.1 M HCl and pH 6.8-phosphate buffer, respectively. The similarity factor f2 values of MHSRT in three different dissolution medium were 82, 80 and 74, respectively in comparison with imported Fortamet?, which were all greater than 50. The results of storage-stability showed that MHSRT were stable for at least 6 months under stress condition (40℃ ± 2℃, RH 75% ± 5%). Therefore, in this study, MHSRT were successfully prepared using optimized formulation technologies that meet mass produce. The in vitro release behavior of MHSRT was almost similar to that of imported Fortamet?.展开更多
目的建立一种快速、准确同时测定扑热息痛苯海拉明片含量的高效液相色谱检测方法。方法色谱柱为phenomenex luna C8(250×4.6mm,5μm);流动相为0.05mol·L-1磷酸二氢钾溶液(A)-乙腈(B),梯度洗脱[0min时A-B(85∶15),5min时A-B(45...目的建立一种快速、准确同时测定扑热息痛苯海拉明片含量的高效液相色谱检测方法。方法色谱柱为phenomenex luna C8(250×4.6mm,5μm);流动相为0.05mol·L-1磷酸二氢钾溶液(A)-乙腈(B),梯度洗脱[0min时A-B(85∶15),5min时A-B(45∶55),5.1min时A-B(85∶15)];检测波长为300nm和220nm;流速为1.0mL·min-1。结果扑热息痛和苯海拉明线性范围分别为1.25~7.50mg·mL-1(r=0.9996),63.08~378.48μg·mL-1(r=0.9998);平均回收率分别为100.0%和99.74%(n=9)。结论该方法简便、结果准确,可同时测定复方制剂中两种成分。展开更多
文摘The objective of this study was to develop once-daily metformin hydrochloride sustained-release tablets (MHSRT) and evaluate their in vitro release behavior. MHSRT were prepared by the film coating method. The in vitro drug release rate of MHSRT and the commercial tablets Fortamet? made in the United States of America in water was fitted with zero order kinetic equation, and Ritger-Peppas kinetic equation in 0.1 M HCl and pH 6.8-phosphate buffer, respectively. The similarity factor f2 values of MHSRT in three different dissolution medium were 82, 80 and 74, respectively in comparison with imported Fortamet?, which were all greater than 50. The results of storage-stability showed that MHSRT were stable for at least 6 months under stress condition (40℃ ± 2℃, RH 75% ± 5%). Therefore, in this study, MHSRT were successfully prepared using optimized formulation technologies that meet mass produce. The in vitro release behavior of MHSRT was almost similar to that of imported Fortamet?.
文摘目的建立一种快速、准确同时测定扑热息痛苯海拉明片含量的高效液相色谱检测方法。方法色谱柱为phenomenex luna C8(250×4.6mm,5μm);流动相为0.05mol·L-1磷酸二氢钾溶液(A)-乙腈(B),梯度洗脱[0min时A-B(85∶15),5min时A-B(45∶55),5.1min时A-B(85∶15)];检测波长为300nm和220nm;流速为1.0mL·min-1。结果扑热息痛和苯海拉明线性范围分别为1.25~7.50mg·mL-1(r=0.9996),63.08~378.48μg·mL-1(r=0.9998);平均回收率分别为100.0%和99.74%(n=9)。结论该方法简便、结果准确,可同时测定复方制剂中两种成分。