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相关概念视频

Dosage Regimen: Fixed Dose01:01

Dosage Regimen: Fixed Dose

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Fixed-dose regimens are a common approach to administer drugs to achieve and maintain desired levels of the drug in the body. In this dosing strategy, a specific amount of medication is given at regular intervals, often multiple times a day, to ensure a consistent drug concentration in the bloodstream.
Fixed-dose regimens can be used for various routes of administration, including intravenous (IV) injections and oral medications. For IV administration, a predetermined amount of the drug is...
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Dose-Response Relationship: Overview01:03

Dose-Response Relationship: Overview

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Agonists can bind with and activate receptors, resulting in the formation of drug-receptor complexes. Once formed, these complexes catalyze many biochemical processes at the cellular level and subsequently induce a pharmacologic response. The degree of response is directly proportional to the fraction of activated receptors, which in turn, depends on the concentration of the drug at the receptor site as well as the sensitivity of the receptor. An increase in the administered dose contributes to...
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Dose-Response Relationship: Selectivity and Specificity01:25

Dose-Response Relationship: Selectivity and Specificity

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Drugs exert their therapeutic effects by interacting with receptors, enzymes, or ion channels that are present throughout the human body. The strength and duration of the interaction between a drug and its target receptor are characterized by the selectivity and specificity of the drug. Selectivity refers to a drug's strong preference for its intended target over other targets. For instance, isoprenaline, a non-selective β-adrenergic agonist, interacts with both β1- and...
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Rational Dosage Regimen: Maintenance Dose and Loading Dose01:24

Rational Dosage Regimen: Maintenance Dose and Loading Dose

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A rational dosage regimen considers a drug's pharmacokinetics, including its absorption, distribution, metabolism, and elimination from the body. By understanding these factors, the appropriate dosage can be determined, and the dosing schedule can be designed to achieve and maintain the desired therapeutic effect while minimizing adverse effects.
In most cases, drugs are administered repetitively or infused continuously to maintain a steady-state concentration in the body. At a steady...
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Analysis of Population Pharmacokinetic Data01:12

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Analysis of population pharmacokinetic data involves studying the behavior of drugs within diverse populations to understand their pharmacokinetic parameters. Traditional pharmacokinetic methods typically involve collecting samples from a few individuals and estimating these parameters. While these methods are commonly used, they have limitations in capturing the variability in drug response among individuals or heterogeneous populations. Population pharmacokinetics is employed to address these...
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Drug Dosage Regimen: Overview01:15

Drug Dosage Regimen: Overview

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A drug dosage regimen describes the specific instructions and schedule for administering a drug to a patient. It considers factors such as drug dosage, frequency, route of administration, and duration of treatment. Designing an appropriate dosage regimen for a patient aims to achieve a target drug concentration at the site of action.
Typically, the starting dose and dosing interval are guided by the manufacturer's recommendations based on clinical trials conducted during and after drug...
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建立一个适应剂量模拟框架,以帮助选择剂量和时间表.

Richard Hooijmaijers1, Ridhi Parasrampuria2, Eleonora Marostica1

  • 1Leiden Experts on Advanced Pharmacokinetics and Pharmacodynamics (LAP&P), Leiden, The Netherlands.

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|August 13, 2023
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概括

本教程介绍了一个适应剂量模拟框架,以优化药物治疗方案. 它有助于平衡治疗益处和不良影响,通过评估各种剂量策略在.

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科学领域:

  • 制药指标 (Pharmacometrics) 是一个指标.
  • 计算药理学计算药理学
  • 药物开发 药物开发

背景情况:

  • 优化新疗法的剂量方案,特别是在治疗窗口狭窄的瘤学中,对于最大限度地提高临床益处和最大限度地减少不良影响至关重要.
  • 建模和模拟提供了有价值的in silico工具来评估各种剂量场景,旨在减少毒性和治疗中止.

研究的目的:

  • 介绍适应剂量模拟框架的逐步开发,以优化药物剂量和时间表.
  • 提供实施该框架的实际例子,使用mrgsolve进行药物开发决策.

主要方法:

  • 开发了一个自适应模拟框架,整合了药理动力学,药理动力学 (生物标志物,疗效,安全性) 和可变性模型.
  • 包括对个体间和个体内变异性和共变量影响的评估,允许用户定义的模型扩展 (例如,组合疗法).
  • 利用随后的自适应模拟来研究起始剂量,间隔和事件驱动的修改对各种终点的影响.

主要成果:

  • 通过实践示例证明了框架在探索剂量和时间表优化方面的实用性.
  • 展示了自适应模拟如何评估不同剂量策略和修改的影响.
  • 产生了洞察力,以量化建议优化方案,平衡有效性和安全性.

结论:

  • 适应模拟框架有助于定量提出剂量和治疗方案,以优化新疗法的益处风险概况.
  • 促进在剂量选择,疗程设计和剂量修改建议方面做出明智的决策.
  • 通过提供模拟衍生的对剂量优化的洞察力,支持进一步评估治疗策略.