相关实验视频
Updated: Feb 22, 2026

08:58
Optimized Analysis of In Vivo and In Vitro Hepatic Steatosis
Published on: March 11, 2017
17.1K
优化易布洛芬剂量:体内和虚拟药理动力学试验的见解
David Smrčka1, Sreela Ramesh1, Aleksandra Dumicic1
1Zentiva, k.s., U Kabelovny 130, 10237 Prague, Czech Republic.
概括
一种新的易布洛芬双层片 (IR/SR) 提供延长的疼痛缓解,维持治疗水平比立即释放的选择更长时间. 这种配方允许减少剂量频率,同时确保在非处方药的限度内持续治疗症状.
科学领域:
- 药理学 药理学是指药理学的学科.
- 药物输送系统 药物输送系统
背景情况:
- 易布洛芬是一种常见的NSAID,广泛用于缓解疼痛和发烧.
- 特定配方的药物释放概况显著影响着布洛芬的临床疗效.
- 无处方药 (OTC) 布洛芬的最大每日剂量为1200毫克.
研究的目的:
- 系统地比较四种ibuprofen配方的药理学特征.
- 为了评估吸收动力学,血度-时间概况和治疗持续时间.
- 评估不同类型的布洛芬配方对持续疼痛和发烧管理的适用性.
主要方法:
- 在体内药理动力学 (PK) 数据收集.
- 基于生理学的PK建模用于虚拟模拟.
- 评估血度值 (6.8微克/毫升和10.1微克/毫升) 对于作用的开始和持续时间.
主要成果:
- 新型即时和持续释放 (IR/SR) 400毫克双层药片维持了治疗性血度8小时,与即时释放 (IR) 配方相比,覆盖时间延长了2至3.5小时.
- 虚拟PK模拟显示,只有IR200 mg (每天六剂) 和IR/SR400 mg (每天三剂) 方案在OTC限制内24小时内维持治疗水平.
- IR/SR配方证明了长时间的疗效和降低剂量频率.
结论:
- 与传统的IR配方相比,IR/SR 400 mg双层布洛芬片提供了扩展的治疗覆盖.
- 这种新的配方支持持续的疼痛和发烧缓解与较少频繁的剂量计划.
- IR/SR配方是有效的OTC疼痛管理的有希望的选择,在既定的安全范围内.
相关概念视频
Dosage Regimens: Partial Pharmacokinetic Parameters
204
It is not uncommon for complete drug pharmacokinetic profiles to remain elusive in pharmacokinetics. This necessitates certain educated assumptions by pharmacokineticists to determine appropriate dosage regimens without comprehensive pharmacokinetic data from animal or human studies. One prevalent assumption is setting the bioavailability factor, denoted as F, to 1 or 100%. This assumption caters to the scenario where a drug doesn't achieve full systemic absorption, resulting in the patient...
204
Drug Product Performance: In Vitro–In Vivo Correlation
311
In pharmaceutical development, it's crucial to establish a predictive in vitro–in vivo correlation (IVIVC) for two or more formulations to gain a comprehensive understanding of release properties. IVIVC reduces the need for costly in vivo studies and facilitates the establishment of meaningful dissolution specifications with significant cost savings and decreased regulatory burden. Furthermore, a meaningful IVIVC should predict Cmax and AUC within 20%, aligning with FDA guidance while...
311
Bioequivalence studies: Biowaivers
306
Body:In certain scenarios, in vitro dissolution tests can replace in vivo bioequivalence studies. This is particularly true when a drug product, though available in varying strengths, maintains proportional similarity in its active and inactive ingredients. In such cases, the need for in vivo bioequivalence studies for lower strength variants may be waived, provided dissolution tests and in vivo studies on the highest strength yield satisfactory results.Bioequivalence can be indicated through...
306
Drug Dosing in Renal Diseases: Dose Adjustments Based on Drug Clearance and Elimination Rate Constant
255
In patients with renal disease, dosage adjustments are necessary to maintain therapeutic plasma drug concentrations and prevent toxicity or subtherapeutic exposure. Renal impairment alters drug pharmacokinetics, especially in conditions like uremia, where changes such as prolonged elimination half-life and altered apparent volume of distribution can significantly affect drug disposition. These changes require careful modification of the dosing regimen to achieve the desired clinical...
255
Measurement of Bioavailability: Pharmacodynamic Methods
879
Pharmacodynamic methods provide insights into a drug's effects on physiological processes over time and play a crucial role in understanding bioavailability and therapeutic efficacy. These methods can be broadly classified into acute pharmacological and therapeutic response approaches, each with distinct mechanisms and applications.The acute pharmacological response method directly correlates a drug's physiological effects, such as ECG or pupil diameter changes, to its time course in the body.
879
Methods for Studying Drug Absorption: In vitro
662
In vitro experiments are crucial for understanding the transport and absorption of drugs through biological materials. These studies employ varied methods such as the diffusion cell method, the everted sac technique, and the everted ring technique.
The diffusion cell method uses a two-compartment cell, including a donor compartment with the drug solution, which simulates the environment where the drug is applied, and a receptor compartment with a buffer solution, which simulates the environment...
The diffusion cell method uses a two-compartment cell, including a donor compartment with the drug solution, which simulates the environment where the drug is applied, and a receptor compartment with a buffer solution, which simulates the environment...
662

