基于水凝的药物输送系统对药物释放配置的平板电脑几何效应
Seyed-Farid Mohseni-Motlagh1, Roshanak Dolatabadi2,3, Majid Baniassadi1
1School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran 1439957131, Iran.
Pharmaceutics
|July 29, 2023
概括
平板电脑的几何形状显著影响药物释放率,影响药物输送系统的有效性. 了解几何因素可以预测药物释放概况,优化制药配方.
科学领域:
- 制药科学 制药科学
- 材料科学 材料科学 材料科学
- 计算建模 计算建模
背景情况:
- 控制药物释放率对于药物的最佳有效性和安全性至关重要.
- 识别影响药物释放特征的因素从输送系统是必不可少的.
- 平板电脑的几何形状是影响药物从口服输送系统释放的重要因素.
研究的目的:
- 为了研究平板电脑的几何如何影响药物释放概况.
- 为了确定单独的药片几何能否预测药物释放特征.
- 探索药片形状,尺寸和药物释放之间的关系.
主要方法:
- 从200个基于HPMC的片中模拟释放theophylline的药物,使用有限元素分析.
- 药片被分为八种常见的口服药片几何形状.
- 使用了统计分析,包括部分最小平方回归和ANOVA.
主要成果:
- 平板电脑的几何类型和尺寸可以预测药物释放特征,减少了广泛溶解测试的需要.
- 药物释放的准确预测不仅仅取决于与表面相关的变量.
- 药片几何形状的差异显著改变药物释放特征,即使药物剂量和配方成分相同.
- 释放时间在相同质量和材料但不同的几何形状的平板之间可以变化多达七倍.
结论:
- 平板电脑的几何形状是药物释放动力学的关键决定因素.
- 有限元分析与统计方法相结合,为预测药物释放提供了强大的工具.
- 药物片的设计应仔细考虑几何因素,以优化药物输送和治疗结果.
相关概念视频
Factors Influencing Drug Absorption: Pharmaceutical Parameters
154
Solid dosage forms such as tablets and capsules undergo rigorous manufacturing processes to ensure stability and effectiveness. Their dissolution and absorption properties are influenced significantly by the choice of excipients (inactive ingredients that serve various roles in the formulation), and the methodology applied during production. The manufacturing parameters, such as compression force and granulation techniques, significantly affect dissolution rates. Elevated compression forces...
154
Factors Affecting Dissolution: Drug Permeability, Stability and Stereochemistry
230
Orally administered drugs primarily enter the systemic circulation via passive diffusion through the intestinal membranes. The drug's absorption is influenced by drug stability in the gastrointestinal GI tract, membrane permeability, the surface area available for absorption, luminal drug concentration, and residence time in the lumen. Drug permeability can be enhanced by adjusting the lipophilicity, polarity, or molecular size of the drug, promoting its passive transport across intestinal...
230
Factors Affecting Dissolution: Particle Size and Effective Surface Area
891
Dissolution kinetics, an essential aspect of oral drug delivery, is significantly influenced by the drug's particle size. According to the Noyes-Whitney dissolution model, the dissolution rate correlates directly with the drug's surface area. The larger the surface area, the higher the drug's solubility in water, leading to a faster drug dissolution rate. Reducing particle size increases the effective surface area, enhancing the dissolution process. Micronization and nanosizing are...
891
Factors Influencing Drug Absorption: Physicochemical Parameters
323
The physicochemical characteristics of drugs play a crucial role in formulating stable and bioavailable drug products. The solubility of a drug, governed by the varying pH along the GI tract and its dissociation constant (pKa), is pivotal in determining its ionization state and absorption rate. Notably, weak acids and bases remain unionized and are absorbed more rapidly.
Enhanced drug absorption can be achieved by reducing particle sizes and increasing surface areas, thereby facilitating...
Enhanced drug absorption can be achieved by reducing particle sizes and increasing surface areas, thereby facilitating...
323
Factors Affecting Dissolution: Polymorphism, Amorphism and Pseudopolymorphism
338
Polymorphism refers to the existence of a drug substance in multiple crystalline forms, known as polymorphs. Recently, this term has been expanded to include solvates (forms containing a solvent), amorphous forms (non-crystalline forms), and desolvated solvates (forms from which the solvent has been removed).
Some polymorphic crystals possess lower aqueous solubility than their amorphous counterparts, leading to incomplete absorption. For instance, the oral suspension of Chloramphenicol, which...
Some polymorphic crystals possess lower aqueous solubility than their amorphous counterparts, leading to incomplete absorption. For instance, the oral suspension of Chloramphenicol, which...
338
Factors Influencing Drug Absorption: Drug Dissolution
575
The pharmacokinetic journey of drugs from solid oral dosage forms into systemic circulation is multifaceted. It begins with disintegration, a prerequisite ensuring a solid dosage form's subdivision into minute particles. Dissolution occurs next as these granulated entities solubilize in gastrointestinal fluids. This solubilization is crucial for the succeeding stage, permeation, which describes the traversal of the drug across the intestinal membrane and its subsequent entry into the blood...
575


