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
Aim To prepare the prolonged-released microspheres of mefformin hydrochloride. Methods Ion-exchange resin-drug mefformin hydrochloride complexes were prepared as core materials, and followed by coating using ethylcell...Aim To prepare the prolonged-released microspheres of mefformin hydrochloride. Methods Ion-exchange resin-drug mefformin hydrochloride complexes were prepared as core materials, and followed by coating using ethylcellulose （EC） by the emulsion solvent diffusion technique. The release rate of mefformin from the microcapsules was highly dependent on the encapsulating formulation, thus being used as an index for formulation screening. Orthogonal experiments were performed to optimize the coating formulation. Results The final chosen formulation for coating of mefformin microcapsules were as follows： （ 1 ） the ratio of EC （20cps） to EC （45cps） was 50：50; （2） the ratio of plasticizer to coating materials was 20% ;and （3） the ratio of resin-mefformin complexes to coating materials was 5 ： 1. Conclusion The prolonged release microspheres of mefformin hydrochloride were successfully prepared.展开更多
The present work explores the application of melt granulation technology to develop a high drug loaded sustained release matrix tablet of Metformin HCl using hydroxypropylcellulose(HPC) as a hydrophilic binder and ste...The present work explores the application of melt granulation technology to develop a high drug loaded sustained release matrix tablet of Metformin HCl using hydroxypropylcellulose(HPC) as a hydrophilic binder and stearic acid as an extrusion aid for producing cohesive granules. This novel approach allowed the use of a minimum number of excipients to reduce the tablet size, and to enhance compressibility of the drug. This also offered a cost effective method owing to the elimination of a ‘drying step’ prevalent in wet granulation method.Moreover, this research also focuses on resolving the processability issues associated with the use of HPC Nisso-H at high drug loading. The thermal lubricants were screened for this purpose and evaluated for their impact on extrudability, granule and tablet characteristics. Stearic acid was selected as the thermal lubricant, which not only contributed to the inhibition of burst release, but also improved the flow property of the granules.The developed matrix tablet(75% drug loading) resulted in 670 mg of weight for 500 mg dose strength and showed sustained drug release over 10 h. When compared, with conventional granulation techniques, it was observed that, under identical compression force, the tablet prepared by MG exhibited superior compactibility along with tablet hardness and optimal drug release profile. FTIR suggested nonexistence of chemical interaction between the drug and the other excipients while XRD and DSC analysis revealed the crystalline state of the drug.Furthermore, the results obtained from Raman spectroscopy proved the uniform distribution of the Metformin HCl and polymer in the final dosage form. This technology leads to the manufacture of sustained release matrix formulation with reduced tablet size of a high dose,highly water soluble drug otherwise difficult to process using standard batch-granulation.展开更多
目的:探讨二甲双胍恩格列净片治疗2型糖尿病(T2DM)合并射血分数保留性心力衰竭(HFpEF)患者的临床效果和安全性。方法:选取2021年10月—2022年9月保定市第一中心医院80例T2DM合并HFpEF患者,通过随机数字表法将其分为观察组(n=40)和对照组...目的:探讨二甲双胍恩格列净片治疗2型糖尿病(T2DM)合并射血分数保留性心力衰竭(HFpEF)患者的临床效果和安全性。方法:选取2021年10月—2022年9月保定市第一中心医院80例T2DM合并HFpEF患者,通过随机数字表法将其分为观察组(n=40)和对照组(n=40)。对照组给予常规药物治疗,观察组在对照组的用药基础上联合二甲双胍恩格列净片治疗。两组均接受为期6个月的连续治疗。对比两组血糖指标、心功能指标及不良反应发生情况。结果:治疗后,两组空腹血糖(FBG)、餐后2 h血糖(2 h PG)、糖化血红蛋白(HbA1c)均较治疗前下降,且观察组均低于对照组(P<0.05)。治疗后,两组左室射血分数(LVEF)、左室舒张末径(LVEDD)、左室收缩末径(LVESD)、脑钠肽(BNP)均优于治疗前,且观察组均优于对照组(P<0.05)。观察组不良反应发生率(5.0%)低于对照组(22.5%),差异有统计学意义(P<0.05)。结论:二甲双胍恩格列净片治疗2型糖尿病合并HFpEF临床效果显著,能够使患者的血糖水平下降并提高心功能相关指标,同时安全性较高。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Aim To prepare the prolonged-released microspheres of mefformin hydrochloride. Methods Ion-exchange resin-drug mefformin hydrochloride complexes were prepared as core materials, and followed by coating using ethylcellulose （EC） by the emulsion solvent diffusion technique. The release rate of mefformin from the microcapsules was highly dependent on the encapsulating formulation, thus being used as an index for formulation screening. Orthogonal experiments were performed to optimize the coating formulation. Results The final chosen formulation for coating of mefformin microcapsules were as follows： （ 1 ） the ratio of EC （20cps） to EC （45cps） was 50：50; （2） the ratio of plasticizer to coating materials was 20% ;and （3） the ratio of resin-mefformin complexes to coating materials was 5 ： 1. Conclusion The prolonged release microspheres of mefformin hydrochloride were successfully prepared.
基金the financial support received from University Grants Commission (UGC)
文摘The present work explores the application of melt granulation technology to develop a high drug loaded sustained release matrix tablet of Metformin HCl using hydroxypropylcellulose(HPC) as a hydrophilic binder and stearic acid as an extrusion aid for producing cohesive granules. This novel approach allowed the use of a minimum number of excipients to reduce the tablet size, and to enhance compressibility of the drug. This also offered a cost effective method owing to the elimination of a ‘drying step’ prevalent in wet granulation method.Moreover, this research also focuses on resolving the processability issues associated with the use of HPC Nisso-H at high drug loading. The thermal lubricants were screened for this purpose and evaluated for their impact on extrudability, granule and tablet characteristics. Stearic acid was selected as the thermal lubricant, which not only contributed to the inhibition of burst release, but also improved the flow property of the granules.The developed matrix tablet(75% drug loading) resulted in 670 mg of weight for 500 mg dose strength and showed sustained drug release over 10 h. When compared, with conventional granulation techniques, it was observed that, under identical compression force, the tablet prepared by MG exhibited superior compactibility along with tablet hardness and optimal drug release profile. FTIR suggested nonexistence of chemical interaction between the drug and the other excipients while XRD and DSC analysis revealed the crystalline state of the drug.Furthermore, the results obtained from Raman spectroscopy proved the uniform distribution of the Metformin HCl and polymer in the final dosage form. This technology leads to the manufacture of sustained release matrix formulation with reduced tablet size of a high dose,highly water soluble drug otherwise difficult to process using standard batch-granulation.
文摘目的:探讨二甲双胍恩格列净片治疗2型糖尿病(T2DM)合并射血分数保留性心力衰竭(HFpEF)患者的临床效果和安全性。方法:选取2021年10月—2022年9月保定市第一中心医院80例T2DM合并HFpEF患者,通过随机数字表法将其分为观察组(n=40)和对照组(n=40)。对照组给予常规药物治疗,观察组在对照组的用药基础上联合二甲双胍恩格列净片治疗。两组均接受为期6个月的连续治疗。对比两组血糖指标、心功能指标及不良反应发生情况。结果:治疗后,两组空腹血糖(FBG)、餐后2 h血糖(2 h PG)、糖化血红蛋白(HbA1c)均较治疗前下降,且观察组均低于对照组(P<0.05)。治疗后,两组左室射血分数(LVEF)、左室舒张末径(LVEDD)、左室收缩末径(LVESD)、脑钠肽(BNP)均优于治疗前,且观察组均优于对照组(P<0.05)。观察组不良反应发生率(5.0%)低于对照组(22.5%),差异有统计学意义(P<0.05)。结论:二甲双胍恩格列净片治疗2型糖尿病合并HFpEF临床效果显著,能够使患者的血糖水平下降并提高心功能相关指标,同时安全性较高。
