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Design and development of novel lipid based gastroretentive delivery system: response surface analysis, in-vivo imaging and pharmacokinetic study

机译:基于脂质的新型胃滞留递送系统的设计和开发:响应面分析,体内成像和药代动力学研究

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Famotidine HCl has low bioavailability (40–45%) due to its narrow absorption window and low solubility in intestinal pH. Lipids were utilized in the formulation of novel gastroretentive dosage forms to increase the availability of famotidine HCl at its absorption site. Novel non-swellable gastroretentive lipid disks (D) and swellable compression coated tablets with a lipid core (T) were prepared. Formulae were characterized by friability testing, in-vitro buoyancy, in-vitro drug release and scanning electron microscopy (SEM). Factorial designs of 22?×?31 and 32 were planned for the optimization of disks and tablets, respectively, using Design-Expert? software. X-ray imaging was used for the in-vivo visualization of the selected formula in human gastrointestinal tract (GIT). Moreover, a bioavailability study was performed in healthy human volunteers using the optimized disk formula (D10). Results showed that formulae D10 (containing stearyl alcohol and polyethylene glycol in a ratio of 9:1 w/w) and T7 (containing polyethylene oxide only) had highest desirability values (0.684 and 0.842, respectively). Lipids achieved instantaneous floating and sustained the release of famotidine HCl over a prolonged period of time with significant bioavailability enhancement.
机译:法莫替丁盐酸盐的吸收窗口窄,在肠道pH值中溶解度低,因此具有较低的生物利用度(40–45%)。脂质用于新型胃滞留剂型的制剂中,以增加法莫替丁盐酸盐在其吸收部位的利用率。制备了新型的非溶胀性胃滞留性脂质盘(D)和具有脂质核的可溶胀的压缩包衣片剂(T)。通过脆性测试,体外浮力,体外药物释放和扫描电子显微镜(SEM)对配方进行表征。使用Design-Expert,分别计划了2 2?×?3 1 和3 2 的析因设计来优化磁盘和平板电脑?软件。 X射线成像用于在人的胃肠道(GIT)中对选定配方进行体内可视化。此外,使用优化的磁盘公式(D10)在健康的人类志愿者中进行了生物利用度研究。结果表明,式D10(含有硬脂醇和聚乙二醇的比例为9:1 w / w)和T7(仅含有聚环氧乙烷)具有最高的期望值(分别为0.684和0.842)。脂质可实现瞬时漂浮,并在很长一段时间内持续释放法莫替丁HCl,从而显着提高生物利用度。

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