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??OBJECTIVE To investigate the in-vitro release behavior of venetoclax preparations, the pharmacokinetic processes and the correlations between in-vitro release and in-vivo absorption of venetoclax in Beagle dogs. METHODS The dissolution curves of venetoclax preparations in different dissolution media were studied. HPLC method was established for the determination of venetoclax in Beagle dogs, and the pharmacokinetics were studied for commercial venetoclax tablets in Beagle dogs under fed and fasted states.The IVIVC study was carried out by linear regression of cumulative in-vitro drug release and in-vivo absorption accumulation percentage data. RESULTS The in-vitro release behavior among venetoclax formulation in 4 dissolution media were significant difference. The simple, accurate and rapid analysis method for venetoclax blood samples was established. The fed group and the fasted group AUC_0???? were (32.38??5.87) and (27.70??6.32) mg??h??L^-1, the concentration of peak were (4.04??0.78) and (3.72 ??0.69) ??g??mL^-1, the peak time were (6.01??1.04) and (4.27??0.92) h, respectively, and there was obvious difference (P<0.05) in AUC_0???? and the peak time between two group. Percentage of in-vivo absorption was in good agreement with in-vitro release in pH 6.8 0.2%SDS media. CONCLUSION The study shows that food could improve the bioavailability of venetoclax formulation; 0.2%SDS pH 6.8 media (paddle, 75 r??min^-1) is the in-vivo release of venetoclax associated with the in-vitro release condition.     

国产非那雄胺片与原研制剂体外溶出一致性评价及采用计算机模拟技术建立体内外相关性模型研究

目的 通过比较国产非那雄胺片与原研制剂的体外溶出行为,评价仿制药与参比制剂的质量一致性,利用计算机模拟技术分析体内外相关性。方法 参照《中国药典》2015年版方法(2020年版《中国药典》该项目没有变化),分别考察国产制剂与原研制剂在4种不同溶出介质(pH 1.2盐酸溶液、pH 4.5醋酸盐溶液、pH 6.8磷酸盐溶液、水)中的体外溶出行为。同时借助GastroPlus^TM软件结合体外溶出试验结果,建立非那雄胺片体内外相关性模型。结果 在选定条件下,国内15家制药公司中有3家公司产品在4种溶出介质中的溶出曲线均与原研制剂相似。软件分析结果提示,体外溶出曲线与软件模拟的体内行为不相似。结论 大部分非那雄胺片仿制制剂在体外的溶出曲线与原研制剂存在一定的差异,国产非那雄胺片工艺水平及处方有待提高,反映体内释放行为的生物体相关溶出条件有待进一步研究。     

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??OBJECTIVE To establish a determination method of the dissolution curves of albendazole tablets with differentiation ability and investigate the similarity of dissolution curves in vitro between reference preparation and generic preparations.METHODS Paddle method was adopted with rotation speed of 50 r??min^-1 and the dissolution medium volume was 900 mL. The dissolution media were pH 1.2 hydrochloric acid solution and water. The similarity factor (f₂) method was used to evaluate the comparability of dissolution curves.RESULTS The three established dissolution curves had good distinguishing ability. As shown by the similarity factor (f₂), the generic preparation from manufacture A was similar to the reference preparation, while those from the manufacture B and C were not similar.CONCLUSION The study provides the experimental basis for the consistency evaluation of the dissolution curves of abendazole tablets.     

已公布的卡马西平片参比制剂在体内外的相关性研究

目的 以2家企业、2种规格的卡马西平片作为参比制剂进行体内外相关性研究,指导国内仿制药企业更好地开展仿制药一致性评价工作。方法 测定北京诺华和太阳药业(日本)生产的卡马西平片参比制剂在5种不同溶出介质中的溶出曲线,随后应用Gastro Plus软件建模、人工仿生膜结合Macro Flux^TM 型药物溶出度与渗透速率测试系统进行体内外相关性研究,预测2家参比制剂的体内生物等效性。结果 2家企业的卡马西平片参比制剂在5种溶出介质中的溶出曲线均不相似,Gastro Plus软件虚拟生物等效性(BE)与溶出-渗透测定结果显示2家制剂在空腹和饱腹2种状态中均存在生物不等效风险。结论 本研究发现2家企业的卡马西平片参比制剂体外溶出不一致,软件建模预测及人工仿生膜技术预测其体内存在生物不等效的风险,对同时生产两种规格制剂的企业而言,可能导致同一企业不同规格的仿制药在一致性评价中存在生物不等效的风险,建议国家药监局确定唯一企业的参比制剂。本研究为卡马西平片参比制剂的选择提供了数据基础,也为窄治疗窗口药物参比制剂的遴选和确定提供参考,同时为仿制药一致性评价提供技术支撑。     

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??OBJECTIVE To prepare amoxicillin enteric-coated tablets and study the in vitro release properties. METHODS The drug-containing pellets were prepared by extrusion-spheronization process. Taking the cumulative release at 15 min as the response value, the optimization test was performed using the common rotation combination design and the optimal formulation was validated. The drug-containing pellets were coated with Eudragit L30D-55 to prepare enteric-coated pellets. The effects of different coating weight gains on the release characteristics of enteric-coated pellets, different amounts of plasticizer on the release characteristics of enteric-coated pellets and tablets, and different hardness of tablets on the release characteristics of enteric-coated tablets were investigated by single factor method. RESULTS The optimal formulation of the drug-containing pellets determined by response surface analysis method included 5% of croscarmellose sodium, 1.2% of polyoxyethylene 35 castor oil and 1% hydroxypropyl cellulose. The predictive value of the cumulative release at 15 min was close to the measured value. The coating weight gain of Eudragit L30D-55 should be about 20%, the amount of plasticizer should be 30% of solid content of Eudragit L30D-55, and the hardness of tablets was (130??20)N. CONCLUSION It is reasonable and reliable to optimize the formulation of drug-containing pellets by response surface analysis method. The enteric-coated tablets have good delayed release effect, and this product has the feasibility of industrial production.     

苦参总碱肠溶片制备和体外分析方法建立

目的：制备苦参总碱肠溶片，并建立体外释放度分析方法。方法：采用湿法制粒制备片芯，以欧巴代OY-P-7171为包衣材料，并采用HPLC考察其体外释放影响因素。结果：压制硬度适宜的苦参总碱片芯关键在于稀释剂的种类和用量，使用的薄膜衣材料的性质决定了药物在胃液中和肠液中释放。结论：制备的苦参总碱肠溶片在胃液中几乎不释放，在肠液中迅速释放。     

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??OBJECTIVE To consummate drug specifications and improve the overall level of generic drugs in our country, the consistency evaluation method of calcium gluconate tablets is proposed. METHODS With its critical quality attributes(CQA) as the evaluation starting point, as well as combination of production process and specifications described in pharmacopoeias, the evaluation method of calcium gluconate tablets has been suggested. RESULTS The pharmaceutical research of calcium gluconate tablets should be focused on production process of tablets and its effect on the quality and stability of products, the method establishment and validation of determination for dissolution profiles, dissolution profiles investigation of products under different pH values, differences on the dissolution profiles of products. And some CQA such as dissolution, friability and content etc. should also be considered. The necessity of its in vivo evaluation is open to discuss. CONCLUSION When no reference listed drug(RLD) is available, eg calcium gluconate tablets, the consistency evaluation should be carried out by pharmaceutical factories case by case.