口腔速溶膜剂(oral fast dissolving films,OFDF)是口腔黏膜给药系统中一个新剂型,表现出的许多优点引起广泛的关注,许多制药公司都将快速溶解技术作为一个研究重点。OFDF制剂的生产制备方法主要有溶剂浇铸法和热熔挤压法。目前该制剂...口腔速溶膜剂(oral fast dissolving films,OFDF)是口腔黏膜给药系统中一个新剂型,表现出的许多优点引起广泛的关注,许多制药公司都将快速溶解技术作为一个研究重点。OFDF制剂的生产制备方法主要有溶剂浇铸法和热熔挤压法。目前该制剂产品涉及食品、药品领域,既有治疗口腔疾病的局部药膜,也有发挥全身作用的药膜,由于其独特的剂型优势,许多大公司对此产生浓厚的兴趣,将某些药物进行剂型转换来延长专利期是目前研究的热点。展开更多
目的采用热熔挤出技术制备姜黄素固体分散体,以提高姜黄素的溶解度和溶出度。方法以姜黄素为模型药物,丙烯酸树脂Eudragit E PO(EPO)为载体,溶解度参数法评价药物与载体的相容性。以姜黄素的含量、结晶度和溶出度为评价指标,单因素实验...目的采用热熔挤出技术制备姜黄素固体分散体,以提高姜黄素的溶解度和溶出度。方法以姜黄素为模型药物,丙烯酸树脂Eudragit E PO(EPO)为载体,溶解度参数法评价药物与载体的相容性。以姜黄素的含量、结晶度和溶出度为评价指标,单因素实验筛选热熔挤出过程中的机筒温度、螺杆转速和冷却速率,优化制备工艺,并与溶剂法和熔融法比较。结合差示扫描量热法、X射线衍射法、傅里叶变换红外光谱法、饱和溶解度测定和体外溶出度试验等对热熔挤出最佳工艺制备的固体分散体进行表征与评价。结果最佳制备工艺:螺杆转速为100 r/min,机筒温度为130~160℃,冷却方式为液氮冷却。此条件下制备的姜黄素固体分散体,药物以无定形态分散在载体中,药物与载体间形成较强的相互作用。结论热熔挤出技术可制备热敏性姜黄素分散体,为采用热熔挤出技术制备热敏性药物固体分散体的研究提供了一定的实验参考。展开更多
The objective of the study was to prepare solid dispersions containing a thermally unstable drug by hot-melt extrusion(HME).Carbamazepine(CBZ)was selected as model drug and combinations of Kollidon VA64(VA64),Soluplus...The objective of the study was to prepare solid dispersions containing a thermally unstable drug by hot-melt extrusion(HME).Carbamazepine(CBZ)was selected as model drug and combinations of Kollidon VA64(VA64),Soluplus(SOL)and Eudragit EPO(EPO)were utilized as carriers.Preformulation was conducted to identify the suitability of polymer combinations based on solubility parameters,differential scanning calorimetry(DSC),hot stage microscopy and thermogravimetric analysis.Physicochemical properties of solid dispersions were determined by DSC,X-ray diffraction,fourier transform infrared spectroscopy,dissolution and accelerated stability testing.The results show that drug-polymer miscibility at temperatures below the melting point(Tm)of CBZ was improved by combining EPO with VA64 or SOL.With 30%drug loading in a solid dispersion in SOL:EPO(1:1,w/w),CBZ was mainly present in an amorphous form accompanied by a small amount of a microcrystalline form.The dissolution rate of the solid dispersion was significantly increased(approximately 90%within 5 min)compared to either the pure drug(approximately 85%within 60 min)or the corresponding physical mixture(approximately 80%within 60 min)before and after storage.The solid dispersion in SOL:EPO(1:1,w/w)was relatively stable at 401C/75%RH under CBZ tablet packaging conditions for at least 3 months.In conclusion,polymer combinations that improve drug-polymer miscibility at an HME processing temperature below the Tm of a drug appear to be beneficial in the preparation of solid dispersions containing thermally unstable drugs.展开更多
Despite the potential advantages of amorphism-induced supersaturation,the merit of new amorphiza-tion formation methods on the properties of the amorphous drug including the stability of the amor-phous state,dissoluti...Despite the potential advantages of amorphism-induced supersaturation,the merit of new amorphiza-tion formation methods on the properties of the amorphous drug including the stability of the amor-phous state,dissolution/solubility,supersaturation,and"spring-parachute"process is still poorly understood,particularly for certain amorphous supersaturating drug delivery systems(aSDDS).The present work aimed to explore the detailed merit of current attractive amorphization manufacturing methods(i.g.,hot-melt extrusion(HME)technique)on the property improvement of aSDDS in form of amorphous solid dispersion microparticles by employing a model Bcs II drug nitrendipine and a polyvinylpyrrolidone-based model polymer copovidone.Many asDDS systems were developed by various methods,and their physicochemical properties were characterized by SEM,PXRD and DSC.HME-triggered amorphization induced superior supersaturation by the observation of the highest dissolution and solubility.HME induced the optimal supersaturation duration by the observed greatest extension of"spring-parachute"process(e.g,maximum AUCspring-parachute).HME technique is comparable with other techniques for the stabilization of amorphous state during storage.All aSDDS systems by HME and other methods showed improved long-term stability of the amorphous state in comparison to the pure amorphous drug.Fourier transformation infrared spectroscopy,Noyes-Whitney equation,nucleation theory and Gibbs free energy of transfer(△G)were used to analyze the underlying mechanisms.Mo-lecular mechanism studies indicated that HME caused a stronger crystallization inhibition effect in the asDDS systems than other methods,but molecular interaction is not a dominant mechanism for property enhancement caused by HME.For the mechanism associated with the polymer itself(PVPVA64),it could inhibit the drug recrystallization,solubilize the drug spontaneously and cause the improved molecular interactions in all aSDDS systems.This study provided a deep insight into detailed advantage of HME展开更多
文摘口腔速溶膜剂(oral fast dissolving films,OFDF)是口腔黏膜给药系统中一个新剂型,表现出的许多优点引起广泛的关注,许多制药公司都将快速溶解技术作为一个研究重点。OFDF制剂的生产制备方法主要有溶剂浇铸法和热熔挤压法。目前该制剂产品涉及食品、药品领域,既有治疗口腔疾病的局部药膜,也有发挥全身作用的药膜,由于其独特的剂型优势,许多大公司对此产生浓厚的兴趣,将某些药物进行剂型转换来延长专利期是目前研究的热点。
文摘目的采用热熔挤出技术制备姜黄素固体分散体,以提高姜黄素的溶解度和溶出度。方法以姜黄素为模型药物,丙烯酸树脂Eudragit E PO(EPO)为载体,溶解度参数法评价药物与载体的相容性。以姜黄素的含量、结晶度和溶出度为评价指标,单因素实验筛选热熔挤出过程中的机筒温度、螺杆转速和冷却速率,优化制备工艺,并与溶剂法和熔融法比较。结合差示扫描量热法、X射线衍射法、傅里叶变换红外光谱法、饱和溶解度测定和体外溶出度试验等对热熔挤出最佳工艺制备的固体分散体进行表征与评价。结果最佳制备工艺:螺杆转速为100 r/min,机筒温度为130~160℃,冷却方式为液氮冷却。此条件下制备的姜黄素固体分散体,药物以无定形态分散在载体中,药物与载体间形成较强的相互作用。结论热熔挤出技术可制备热敏性姜黄素分散体,为采用热熔挤出技术制备热敏性药物固体分散体的研究提供了一定的实验参考。
文摘The objective of the study was to prepare solid dispersions containing a thermally unstable drug by hot-melt extrusion(HME).Carbamazepine(CBZ)was selected as model drug and combinations of Kollidon VA64(VA64),Soluplus(SOL)and Eudragit EPO(EPO)were utilized as carriers.Preformulation was conducted to identify the suitability of polymer combinations based on solubility parameters,differential scanning calorimetry(DSC),hot stage microscopy and thermogravimetric analysis.Physicochemical properties of solid dispersions were determined by DSC,X-ray diffraction,fourier transform infrared spectroscopy,dissolution and accelerated stability testing.The results show that drug-polymer miscibility at temperatures below the melting point(Tm)of CBZ was improved by combining EPO with VA64 or SOL.With 30%drug loading in a solid dispersion in SOL:EPO(1:1,w/w),CBZ was mainly present in an amorphous form accompanied by a small amount of a microcrystalline form.The dissolution rate of the solid dispersion was significantly increased(approximately 90%within 5 min)compared to either the pure drug(approximately 85%within 60 min)or the corresponding physical mixture(approximately 80%within 60 min)before and after storage.The solid dispersion in SOL:EPO(1:1,w/w)was relatively stable at 401C/75%RH under CBZ tablet packaging conditions for at least 3 months.In conclusion,polymer combinations that improve drug-polymer miscibility at an HME processing temperature below the Tm of a drug appear to be beneficial in the preparation of solid dispersions containing thermally unstable drugs.
基金supported by National Natural Science Foundation of China(No.82172593 and 82204729)Science and Technology Development Program of Jjilin Province of China(No.20210101430JC,YDZJ202201ZYTS234 and YDZJ202201ZYTS223)+4 种基金China Postdoctoral Science Foundation(No.2015M571373)Science and Technology Development Program of jilin City in Jjilin Province of China(No.20200104067,201831739 and 201464053)Scientific Research Foundation of the Education Department of Jilin Province of China(No.JJKH20191072KJ and 2015-401)Doctoral Research Startup Fund Project of Jilin Medical University(No.JYBS2021002LK)the College Students'Innovation Project of Jilin Province(No.202013706026).
文摘Despite the potential advantages of amorphism-induced supersaturation,the merit of new amorphiza-tion formation methods on the properties of the amorphous drug including the stability of the amor-phous state,dissolution/solubility,supersaturation,and"spring-parachute"process is still poorly understood,particularly for certain amorphous supersaturating drug delivery systems(aSDDS).The present work aimed to explore the detailed merit of current attractive amorphization manufacturing methods(i.g.,hot-melt extrusion(HME)technique)on the property improvement of aSDDS in form of amorphous solid dispersion microparticles by employing a model Bcs II drug nitrendipine and a polyvinylpyrrolidone-based model polymer copovidone.Many asDDS systems were developed by various methods,and their physicochemical properties were characterized by SEM,PXRD and DSC.HME-triggered amorphization induced superior supersaturation by the observation of the highest dissolution and solubility.HME induced the optimal supersaturation duration by the observed greatest extension of"spring-parachute"process(e.g,maximum AUCspring-parachute).HME technique is comparable with other techniques for the stabilization of amorphous state during storage.All aSDDS systems by HME and other methods showed improved long-term stability of the amorphous state in comparison to the pure amorphous drug.Fourier transformation infrared spectroscopy,Noyes-Whitney equation,nucleation theory and Gibbs free energy of transfer(△G)were used to analyze the underlying mechanisms.Mo-lecular mechanism studies indicated that HME caused a stronger crystallization inhibition effect in the asDDS systems than other methods,but molecular interaction is not a dominant mechanism for property enhancement caused by HME.For the mechanism associated with the polymer itself(PVPVA64),it could inhibit the drug recrystallization,solubilize the drug spontaneously and cause the improved molecular interactions in all aSDDS systems.This study provided a deep insight into detailed advantage of HME
