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Related Concept Videos

Factors Affecting Dissolution: Drug Permeability, Stability and Stereochemistry01:20

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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...
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Factors Influencing Drug Absorption: Physicochemical Parameters01:22

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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.
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Factors Influencing Drug Absorption: Pharmaceutical Parameters01:28

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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...
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When a drug is taken orally, it undergoes a journey starting from the gastrointestinal (GI) tract, passing through the portal vein, reaching the liver, and finally entering the systemic circulation. This process involves the absorption of the drug across the GI tract. The liver is the primary site for metabolizing the drug, with some metabolism also occurring in the gut wall. This journey significantly reduces the quantity of the drug that reaches the systemic circulation, a phenomenon known as...
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Understanding drugs, drug products, and their performance in pharmaceutical science is pivotal. Drugs, whether simple molecules or complex compounds, are designed to interact with the body's biological systems to diagnose, treat, or prevent diseases. Drug products include various delivery systems such as tablets, capsules, injections, and inhalers. The performance of these drug products is gauged by their ability to deliver the active ingredient to the desired site of action at the...
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The selection of a drug's delivery route depends upon its physicochemical properties, including lipid or water solubility and ionization, as well as the therapeutic requirement, such as immediate or sustained effect. These routes can be divided into three primary categories: enteral, parenteral, and topical.
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Manufacture and Drug Delivery Applications of Silk Nanoparticles
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Polymers Enhancing Bioavailability in Drug Delivery.

Ana I Fernandes1, Angela F Jozala2

  • 1CiiEM-Interdisciplinary Research Center Egas Moniz, Instituto Universitário Egas Moniz, Monte de Caparica, 2829-511 Caparica, Portugal.

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Summary
This summary is machine-generated.

Drug bioavailability, the rate and extent of drug absorption into circulation, is primarily governed by intrinsic drug properties. Understanding these properties is crucial for effective drug delivery and therapeutic outcomes.

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Area of Science:

  • Pharmacokinetics and Drug Metabolism
  • Medicinal Chemistry

Background:

  • Bioavailability is a critical factor in determining a drug's efficacy and safety.
  • It dictates the amount of active drug reaching the systemic circulation for therapeutic effect.

Discussion:

  • Drug properties significantly influence absorption, distribution, metabolism, and excretion (ADME) processes.
  • Physicochemical characteristics like solubility, lipophilicity, and molecular size play a key role.

Key Insights:

  • Understanding drug properties is essential for predicting and optimizing bioavailability.
  • Tailoring drug design based on these properties can enhance therapeutic performance.

Outlook:

  • Further research into structure-property relationships can guide the development of drugs with improved bioavailability.
  • This knowledge is vital for advancing drug discovery and formulation strategies.