埃索美拉唑镁肠溶微丸的制备及其工艺评价

目的:制备埃索美拉唑镁肠溶微丸并对其工艺进行评价.方法:采用流化床包衣法制备埃索美拉唑镁肠溶微丸,按《中国药典》方法对肠溶微丸进行耐酸力和溶出度测定,验证制备工艺的合理性.结果:制备的肠溶微丸在人工胃液中耐酸力良好,人工肠液中溶出迅速而且完全,工艺稳定.结论:该工艺有效地解决了埃索美拉唑镁的稳定性问题且制备工艺简单易行,重现性好,有望应用于工业化生产.     

埃索美拉唑镁肠溶微丸的制备与质量控制

目的:制备埃索美拉唑镁的肠溶微丸,并建立起埃索美拉唑镁肠溶微丸的质量控制方法.方法:采用流化床底喷包衣的方法,制备出埃索美拉唑镁肠溶微丸,同时评价其体外药物的耐酸力和释放度.结果:自制的埃索美拉唑镁肠溶微丸在pH 1.2的HCl中1h累积释放率小于2%,在pH 6.8的人工肠液中1h累积释放率大于85%.结论:在人工胃酸中,制备的埃索美拉唑镁肠溶微丸耐酸力较好;在人工肠液中,溶出较完全且迅速,说明该方法稳定可靠,可推广.     

埃索美拉唑镁肠溶片的制备

目的：制备埃索美拉唑镁肠溶片并对自制片进行质量分析。方法：采用流化床包衣法制备埃索美拉唑镁肠溶微丸,然后选用适宜辅料采用直接压片法对微丸压片,并将自制片与市售片进行药物体外药物释放度、耐酸力及稳定性的比较。结果：自制的埃索美拉唑镁肠溶片的各项指标均符合质量标准的要求。结论：优选的埃索美拉唑镁肠溶片的处方工艺合理,重现性好,有效地解决了埃索美拉唑镁的稳定性问题。     

共载阿司匹林-埃索美拉唑镁肠溶微丸的研制与评价

在前期分别制备阿司匹林和埃索美拉唑镁肠溶微丸的基础上,本试验设计了共载阿司匹林-埃索美拉唑镁肠溶微丸。首先采用挤出-滚圆法制备含阿司匹林的丸芯,然后用流化床底喷包衣法,依次包隔离层Ⅰ、埃索美拉唑镁、隔离层Ⅱ和肠溶衣层,最终制得共载阿司匹林-埃索美拉唑镁的肠溶微丸。体外释放结果表明,该微丸中2种药物在0.1 mol/L盐酸中2 h内的累积释放率小于5%;随后在pH 6.8磷酸盐缓冲液中,15 min内阿司匹林和埃索美拉唑镁的累积释放率为(5.9±1.1)%和(78.5±1.4)%,60 min时为(77.4±3.3)%和(83.5±1.9)%。大鼠体内药动学结果表明,埃索美拉唑镁和阿司匹林的代谢产物水杨酸的tmax、AUC0→∞、cmax、MRT0→∞分别为(1.50±0.00)和(3.50±0.50)h、(15.73±2.50)和(1158.39±73.73)mg·L^-1·h、(2.89±0.09)和(75.13±2.14)mg/L、(8.30±1.30)和(11.68±0.60)h。本试验所得共载药微丸中埃索美拉唑镁在pH 6.8介质中能快速释药,阿司匹林则经一定时滞后再释放,有利于发挥两药协同作用,减轻阿司匹林长期应用对胃肠道的刺激性。     

埃索美拉唑镁肠溶微丸的制备

目的:采用流化床上药包衣技术制备埃索美拉唑镁肠溶微丸。方法:选择含药层药物浓度、隔离层增重、肠衣层增重为影响因素,以肠溶微丸耐酸力和释放度为评价指标,采用Box-Behnken效应面法优化肠溶微丸处方,并对最优处方进行验证。结果:最优处方为上药浓度19.16%,隔离层增重17.15%,肠衣层增重66.15%,优化处方实测值与预测值相近。结论:该处方工艺可行,重复性良好,质量稳定可靠。     

埃索美拉唑镁的工艺改进

目的优化埃索美拉唑镁生产工艺,在埃索美拉唑钠成熟工艺的基础上,使得埃索美拉唑镁生产工艺简单,收率高,产品质量稳定,解决产品含量低,收率不高的问题。方法埃索美拉唑钠在15N的纯化水中溶解,滴加0.5~0.6N的氯化镁水溶液,反应5h经过后处理得到产品埃索美拉唑镁。结果得到白色埃索美拉唑镁,摩尔收率85%,质量符合产品质量标准。结论该工艺操作简单,产品质量和收率符合车间生产要求。     

埃索美拉唑肠溶胶囊治疗幽门螺杆菌疗效观察

目的:观察埃索美拉唑肠溶胶囊治疗幽门螺杆菌(Hp)的疗效,并评价其安全性。方法:59例Hp阳性的十二指肠溃疡患者随机分为试验组(29例)与对照组(27例),分别服用埃索美拉唑肠溶胶囊或埃索美拉唑镁肠溶片40mg(qd)及克拉霉素500mg(bid)、替硝唑500mg(bid),连用7d。结果:试验组Hp根除率为62.07%,对照组为37.04%,2组间无显著性差异(P>0.05);2组不良反应发生率相似,试验组为17.24%,对照组为14.81%。结论:埃索美拉唑肠溶胶囊治疗Hp效果与埃索美拉唑镁肠溶片相似,安全性好。     

兰索拉唑肠溶微丸胶囊的制备

目的:制备兰索拉唑肠溶微丸胶囊。方法:采用流化床包衣技术,在空白丸芯上依次包以主药层、隔离层和肠溶层,制备成兰索拉唑肠溶微丸,将肠溶微丸装入普通胶囊制成兰索拉唑肠溶微丸胶囊,并考察3批制剂的载药率及在人工肠液和人工胃液中的释放情况。结果:所制微丸圆整度高,外观亮泽,载药均匀、载药率高(平均值在96%以上),包衣效果好;其在人工肠液中45min的体外累积释放率大于(94.3±0.76)%,在人工胃液中2h的释放量小于(6.2±1.6)%。结论:所制兰索拉唑肠溶微丸胶囊工艺可行,重现性良好,质量稳定可靠,具有良好的体外释药性和耐酸力。     

HPLC法测定埃索美拉唑镁肠溶微丸胶囊中主药的含量

目的：建立以HPLC法测定埃索美拉唑镁肠溶微丸胶囊中埃索美拉唑镁含量的方法。方法：以Kromasil C18（250 mm×4.6 mm,5μm）为色谱柱,流动相为乙腈-0.1 mol·L-1磷酸盐溶液（用磷酸调节pH=7.6）=35：65,检测波长为280 nm,流速为1.0 ml·min-1,柱温为30℃,进样量是20μl。结果：埃索美拉唑镁在20.18201.80μg·ml-1范围内进样量与峰面积呈良好的线性关系（r=0.999 7）,平均回收率为100.1%,RSD=0.8%。结论：本法简便、准确、专属性强,可用于试制剂的含量测定。     

兰索拉唑肠溶微丸的制备及处方优化

目的制备兰索拉唑肠溶微丸。方法采用流化床包衣技术,以空白丸芯为母核,依次包以主药层、隔离层、中性层和肠溶层,制备成兰索拉唑肠溶微丸,并对处方及工艺进行优化。结果按最佳处方工艺制备的3批兰索拉唑肠溶微丸释放度分别为96.4%、94.8%和94.3%。结论本方法制备的兰索拉唑肠溶微丸,工艺可行,质量可靠。     

Delivery of esomeprazole magnesium through nasogastric and gastrostomy tubes using an oral liquid vehicle as a suspending agent in vitro.

PURPOSE: The optimal delivery medium for esomeprazole magnesium enteric-coated pellets dispersed in various concentrations of Ora-Plus suspension through commonly used nasogastric and gastrostomy tubes using a previously used standardized in vitro protocol was studied. METHODS: The study was conducted in two phases. In phase A, 60 size 14 French nasogastric tubes were used to compare esomeprazole pellet delivery via tap water or 30, 50, or 70% Ora-Plus concentrations (15 tubes for each). In phase B, tap water and the concentration that yielded the best pellet delivery from phase A were used with the narrower size 8 and shorter size 20 French tubes. In both phases, the appropriate volume of water was added. All capsules were assumed to have 1,240 pellets. At the end of each administration, pellet retention counts were performed. RESULTS: The results showed excellent delivery of esomeprazole pellets using water as a medium for tube delivery. When compared with tap water as a delivery medium, no differences in pellet retention were observed when 30% and 50% Ora-Plus were used; thus, these Ora-Plus concentrations are feasible alternatives to tap water for nasogastric tube delivery of esomeprazole pellets. CONCLUSION: Administration of esomeprazole magnesium enteric-coated pellets dispersed in tap water or Ora-Plus through size 14 French nasogastric tubes in vitro delivered over 99% of capsule contents, regardless of the Ora-Plus concentration used. For immediate bedside administration, Ora-Plus at 50% concentration is a feasible alternative to water when delivering the pellets through size 14 French tubes, while 30% Ora-Plus is an alternative to water for all tubes studied.     

康复新液联合埃索美拉唑镁肠溶片治疗消化性溃疡疗效观察

目的:观察康复新液对消化性溃疡的疗效。方法:选择经胃内镜确诊的66例消化性溃疡患者,随机分成两组,治疗组口服康复新液和埃索美拉唑镁肠溶片,对照组口服埃索美拉唑镁肠溶片。结果:治疗组和对照组的临床疗效总有效率分别为100%、90.6%;两组治疗后内镜下疗效总有效率分别为97.1%、87.5%。两组有显著性差异,P<0.05。结论:康复新液和埃索美拉唑镁肠溶片联合使用较单用埃索美拉唑镁肠溶片疗效更加可靠,总有效率更高,治愈率明显增加。     

Esomeprazole administered through a nasogastric tube provides bioavailability similar to oral dosing

AIM: To determine if nasogastric tube administration of the enteric-coated pellets from an opened esomeprazole capsule provides bioavailability similar to oral dosing with the intact capsule. METHODS: A randomized, single-centre, open-label, two-period crossover pharmacokinetic study consisting of two 5-day dosing periods separated by a 7- to 14-day washout period was conducted. Healthy subjects between the ages of 18 and 50 years received esomeprazole 40 mg once daily either orally as an intact capsule, or as a suspension of the enteric-coated pellets from an opened capsule in water through a nasogastric tube. RESULTS: In 47 evaluable subjects, the 90% confidence intervals were 0.87-1.08 and 0.93-1.25 for the geometric mean of the ratio of nasogastric tube administration relative to administration of the intact capsule for the area under the plasma concentration-time curve and for maximum plasma concentration, respectively, on day 1, demonstrating bioequivalence. Oral and nasogastric administration also demonstrated similar bioavailabilities on day 5. Esomeprazole was well tolerated regardless of the mode of administration. CONCLUSIONS: Nasogastric tube administration of the enteric-coated pellets from an opened esomeprazole 40 mg capsule provides bioavailability similar to oral dosing. Administration of the contents of an opened esomeprazole 40 mg capsule in water through a nasogastric tube is a practical alternative for patients with feeding tubes who require effective gastric acid suppression, but cannot swallow an oral preparation.