Understanding Drug Distribution in Pharmacokinetics Study Guide
This guide explores the critical second step in pharmacokinetics: drug distribution. Learn about how drugs move from the bloodstream into tissues and body fluids, the factors influencing this process, and the concept of the volume of distribution. We will cover the roles of lipophilicity, ionization, protein binding, and specialized physiological barriers in determining how a drug distributes throughout the body. This information is essential for understanding drug efficacy and optimizing treatm
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Introduction to Pharmacology, Pharmacodynamics, and Pharmacokinetics
Introduction to Pharmacology and Pharmacokinetics
An overview of pharmacology, pharmacodynamics, and pharmacokinetics including drug absorption, distribution, metabolism, and excretion.
- Pharmacology
- Pharmacodynamics
- Pharmacokinetics
- Absorption
- Distribution
- Metabolism
- Excretion
- ADME
- Bioavailability
- pKa
- Metabolite
- Xenobiotic
- Passive diffusion
- Facilitated Diffusion
- Active Transport
Introduction to Pharmacology and Pharmacokinetics
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Drug Distribution and Volume of Distribution
Pharmacokinetics of Drug Distribution
Drug distribution involves movement through body fluid compartments such as plasma, interstitial fluid, transcellular fluid, and intercellular fluid, influenced by factors like volume of distribution, pKa value, and plasma protein binding.
- Body fluid compartments
- Volume of Distribution (Vd)
- Lipid-water partition coefficient
- pKa value
- Plasma protein binding
- Blood Brain Barrier
- Placental Barrier
- Tissue Storage
- Lipophilicity
- Hydrophilicity
Pharmacokinetics of Drug Distribution
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Drug Metabolism and Excretion Processes
Pharmacokinetics of Drug Metabolism and Excretion
Metabolism involves chemical alteration of a drug into less toxic form through Phase I and Phase II reactions, followed by excretion and clearance.
- Metabolism
- Biotransformation
- Phase I Metabolism
- Oxidation
- Reduction
- Hydrolysis
- Cyclization
- Decyclization
- Phase II Metabolism
- Conjugation
- Glucuronide Conjugation
- Sulfate Conjugation
- Glutathione Conjugation
- Aminoacid Conjugation
- Acetylation
- Methylation
- First Pass Metabolism
- Excretion
- Clearance
- Plasma half life
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