复方阿仑膦酸钠缓释片的制备及体外释放度考察

目的:制备复方阿仑膦酸钠缓释片并考察其体外释放度。方法:以羟丙基甲基纤维素(HPMC)、乙基纤维素(EC)、无水乳糖处方用量为因素,体外释放度为指标,用正交试验优化处方,以湿法制粒压片制备制剂,并考察其体外释放度。结果:筛选最优处方为HPMC 80mg、EC 20mg、无水乳糖20mg。所制制剂可持续12h释药,释放行为符合Higuchi方程。结论:所制缓释片的处方合理,具有良好的缓释效果。     

甲硝唑缓释片处方优化研究

目的优化甲硝唑缓释片的处方。方法采用正交试验设计,以体外累积释放度为指标,以羟丙基甲基纤维素(HPMC)的规格、HPMC和乳糖的用量为考察因素,筛选甲硝唑缓释片的最佳处方。结果最佳处方为HPMC的规格为K4M、HPMC 20%、乳糖10%;优化后所制制剂可持续释药12 h。结论甲硝唑缓释片处方合理,具有良好的缓释效果。     

盐酸氯米帕明缓释片的制备及其体外释放度考察

目的:制备盐酸氯米帕明缓释片并考察其体外释放度。方法:以辅料羟丙基甲基纤维素(HPMC)、乳糖、可压性淀粉在处方中的含量为因素,体外释放度为指标,用正交试验优化处方并制备制剂,同时考察其体外释放度。结果:筛选最优处方为HPMC45mg、乳糖35mg、可压性淀粉40mg。所制制剂可持续24h释药,释药行为符合零级释放模型。结论:所制缓释片的处方合理,具有良好的缓释效果。     

正交试验优选氢溴酸右美沙芬缓释片处方

目的:优选氢溴酸右美沙芬缓释片处方。方法:以羟丙甲基纤维素(HPMC)为缓释材料,制备氢溴酸右美沙芬缓释片。采用正交试验,以体外累积释药率相关指标为评价指标,以处方中HPMC的用量、乳糖用量、乙基纤维素(EC)的浓度为因素进行处方的优化。对优化后处方所制制剂进行体外释药性验证试验及影响因素(高温、强光、高湿)考察。结果:最佳处方为HPMC30mg、乳糖50mg、EC浓度8%。制剂8h累积释药率达70%以上,影响因素试验中除高湿条件外制剂的稳定性均较好。结论:优化所得氢溴酸右美沙芬缓释片处方可行。     

4-氨基吡啶凝胶骨架缓释片的制备及体外释放

目的:制备4-氨基吡啶(4-aminopyridine,4-AP)亲水凝胶骨架缓释片。方法:以羟丙甲纤维素的规格、处方用量及乳糖处方用量为因素设计正交试验,以体外释放度为考察指标,优化4-AP凝胶骨架片的处方,并进行批内和批间体外释放度验证试验。采用Origin软件对筛选出的最优处方释放度进行Weibull曲线拟合。考察体外释放条件对药物释放的影响。结果:优化处方为HPMC规格为K100LV,处方用量为54%,乳糖的处方用量为16%。所制得4-AP凝胶骨架片可持续释药12 h,批内释放均一性及批间重复性均良好。Weibull模型拟合方程得出药物释放符合一级速率过程。体外释放条件考察结果表明,转速对药物的释放有影响,而释放介质的种类和测定装置则无显著性影响。结论:所选4-AP凝胶骨架缓释片制备工艺可行,重复性好,有明显的缓释特性。     

去甲斑蝥素缓释片的处方优化及其体外释药特性研究

目的:优化去甲斑蝥素缓释片制备处方及考察其释药特性。方法:以羟丙基甲基纤维素(HPMC)为骨架材料制备去甲斑蝥素亲水凝胶缓释骨架片;以HPMC用量(A)、乳糖用量(B)、乙醇浓度(C)、乙醇用量(D)为因素,以体外释放度综合评分值为指标筛选缓释片的最佳处方并考察其累积释药率。结果:缓释片的最佳处方为A12g、B1.5g、C90%、D10mL;所制缓释片2、6、12h的累积释药率分别为(30.63±1.03)%、(51.70±1.51)%、(89.25±1.04)%,药物释放机制为扩散和骨架溶蚀的协同作用。结论:优化处方制备的去甲斑蝥素缓释片可以达到预期缓释效果。     

辛伐他汀缓释片制备及体外释放研究

目的制备辛伐他汀凝胶骨架缓释片,对影响药物释放的因素进行考查。方法采用紫外分光光度法测定其体外释放度,应用湿法制粒压片法制备缓释片,以羟丙基甲基纤维素（HPMC）为骨架材料,考察了HPMC规格、用量及其它辅料对药物释放的影响,并进行了正交实验优化及处方和制备方法的验证。结果辛伐他汀缓释片的体外释放受HPMC规格、HPMC用量、粘合剂种类的影响,选择HPMC（K15M）为骨架材料,其与主药质量比为1.5∶1,所制缓释片能持续释药12 h,批间重现性良好。结论该制剂处方合理,制备方法可行,具有良好的缓释效果。     

星点设计-响应面法优化盐酸罗沙替丁醋酸酯缓释片的处方

目的:优化盐酸罗沙替丁醋酸酯(ROX)缓释片的处方。方法:采用粉末直接压片法制备ROX缓释片,以1、4、8 h的体外累积释放度的综合指标为指标,以乳糖/微晶纤维素(MCC)(m/m)、乙基纤维素(EC)用量、羟丙基甲基纤维素(HPMC)用量为因素,采用星点设计-响应面法优化制剂处方,并进行验证。结果:最优处方为ROX 75 mg、乳糖45 mg、MCC 91 mg、EC 65 mg、HPMC 124 mg、微粉硅胶2 mg。所制缓释片1、4、8 h的体外累积释放度分别为(30.7±0.5)%、(65.8±0.7)%、(89.4±0.6)%,与预测值的相对误差分别为0.6%、0.8%、1.2%。结论:成功制得达到预期缓释效果的ROX缓释片。     

盐酸丁螺环酮缓释片的制备及其体外释放度考察

目的制备盐酸丁螺环酮缓释片并探讨其体外释放机理.方法以羟丙基甲基纤维素(HPMC)为骨架材料,以乳糖、可压性淀粉、微晶纤维素调节释放度,采用正交试验法进行处方优化,用数学模型拟合释放曲线.结果HPMC、乳糖的用量对释药有显著性影响,盐酸丁螺环酮缓释片的体外释药符合零级释放模型.结论盐酸丁螺环酮缓释片处方设计合理,可进一步开发.     

响应面法优化富马酸喹硫平缓释片处方

目的:优化富马酸喹硫平缓释片处方。方法:以累积释放度综合评分作为响应值,采用3因素3水平的响应面法,确定富马酸喹硫平缓释片处方中羟丙甲纤维素(HPMC)的黏度、用量与枸橼酸钠、乳糖的用量,并探讨其体外释药机制。结果:骨架材料选择HPMC K15M,考虑到实际操作便利确定其用量为13.5%,枸橼酸钠用量为9.5%,乳糖用量为14%。缓释片体外释放符合Higuchi方程,释药机制为扩散和溶蚀并存的双重机制。结论:筛选所得的富马酸喹硫平缓释片处方工艺稳定可行,有一定的缓释作用。     

那格列奈/盐酸二甲双胍双层片的处方优化

目的:优选由那格列奈速释层与盐酸二甲双胍缓释层组成的双层片处方。方法:先以盐酸二甲双胍在2、4、8h时点的释放度与理想值的偏差之和(γ)为评价指标制备缓释层(12h),并采用正交试验设计优选处方;然后在缓释层处方一定的条件下制备双层片,以那格列奈在45min的释放度(Q)为评价指标优化速释层的处方。结果:盐酸二甲双胍缓释层的最佳处方为羟丙基甲基纤维素K4M20%,黏合剂为10%聚维酮K30(PVP)乙醇溶液;那格列奈速释层的最佳处方为乳糖40%,低取代羟丙基纤维素30%,黏合剂为10%PVP乙醇溶液。结论:正交试验优化的双层片处方良好,达到了设计要求。     

Formulation development and optimization of sustained release matrix tablet of Itopride HCl by response surface methodology and its evaluation of release kinetics

The objective of this present investigation was to develop and formulate sustained release (SR) matrix tablets of Itopride HCl, by using different polymer combinations and fillers, to optimize by Central Composite Design response surface methodology for different drug release variables and to evaluate drug release pattern of the optimized product. Sustained release matrix tablets of various combinations were prepared with cellulose-based polymers: hydroxy propyl methyl cellulose (HPMC) and polyvinyl pyrolidine (pvp) and lactose as fillers. Study of pre-compression and post-compression parameters facilitated the screening of a formulation with best characteristics that underwent here optimization study by response surface methodology (Central Composite Design). The optimized tablet was further subjected to scanning electron microscopy to reveal its release pattern. The in vitro study revealed that combining of HPMC K100M (24.65 MG) with pvp(20 mg)and use of LACTOSE as filler sustained the action more than 12 h. The developed sustained release matrix tablet of improved efficacy can perform therapeutically better than a conventional tablet.     

星点设计-效应面法优化复方氯雷伪麻缓释片的缓释片芯处方

目的:优化复方氯雷伪麻缓释片的缓释片芯处方。方法:以氯雷他定加入包衣层并包衣硫酸伪麻黄碱片芯制备复方氯雷伪麻缓释片。采用星点设计-效应面法优化硫酸伪麻黄碱片芯处方,以单硬脂酸甘油酯(GM)和羟丙甲纤维素(HPMC)K15M用量为考察因素,以硫酸伪麻黄碱1、6、12 h的累积释放度为指标,通过重叠等高线图确定优化处方,并进行处方验证。结果:氯雷他定与欧巴代包衣粉按1∶3比例混合包衣成为速释层;硫酸伪麻黄碱片芯作为缓释层,其处方为每100片(600 mg/片)含硫酸伪麻黄碱12 g、GM 16.72 g、HPMC K15M 20.95 g、微晶纤维素9.73 g、硬脂酸镁0.6 g。优化处方所制制剂中氯雷他定15 min的累积溶出度为87.2%,硫酸伪麻黄碱1、6、12 h的累积释放度分别为34.20%、74.32%、94.60%。结论:缓释片芯处方合理、可行,所制备的复方氯雷伪麻缓释片具有缓释作用。     

格列喹酮缓释片的处方设计

目的：对格列喹酮缓释片进行处方研究。方法：以药物的累积释放度为标准,同时结合相似因子,首先进行单因素试验,确定影响药物释放的主要因素,在此基础上,以HPMC（K4M）及乳糖的含量为变量,进行比较试验,采用综合评分法确定最优处方。并且对最优处方进行验证。结果：最优处方为格列喹酮、HPMC（K4M）、乳糖用量分别为60mg、30mg、55mg,70％乙醇为粘合剂,所制得的格列喹酮缓释片在2,6,12h的体外累积释放度分别为（19．82±0．92）％,（51．07±0．95）％和（83．48±0．71）％。结论：格列喹酮缓释片体外显示出缓释行为,释放度符合规定,可进一步研究开发。     

Investigation of excipient type and level on drug release from controlled release tablets containing HPMC

The purpose of this study was to investigate the influence of excipient type and level on the release of alprazolam formulated in controlled release matrix tablets containing hydroxypropyl methylcellulose (HPMC). Each tablet formulation contained alprazolam, HPMC (Methocel K4MP), excipients, and magnesium stearate. The soluble excipients investigated were lactose monohydrate, sucrose, and dextrose, and the insoluble excipients included dicalcium phosphate dihydrate, dicalcium phosphate anhydrous, and calcium sulfate dihydrate. The similarity factor (f2 factor) was used to compare the dissolution profile of each formulation. The insoluble excipients, especially dicalcium phosphate dihydrate, caused the drug to be released at a slower rate and to a lesser extent than the soluble excipients. Soluble excipients created a more permeable hydrated gel layer for drug release, increased the porosity resulting in faster diffusion of drug, and increased the rate of tablet erosion. Use of binary mixtures of lactose monohydrate and dicalcium phosphate dihydrate produced release profiles of intermediate duration. Rapid drug dissolution was obtained when only 9.1% w/w of lactose monohydrate was present in the tablet formulation. Only when the dicalcium phosphate dihydrate level was sufficiently high (36.5% w/w) was the release rate and extent decreased. It was demonstrated that the type and level of excipient influenced the rate and extent of drug release from controlled release tablets containing HPMC. The release mechanism of alprazolam from each tablet formulation was described by either the Hixson-Crowell cube root kinetics equation or Peppas's equation. However, the different excipient types investigated did not influence the release mechanism of alprazolam from the final tablets.