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Related Concept Videos

Bioavailability Enhancement: Determination and Conceptual Approaches in Overcoming Bioavailability Problems01:22

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Body:Bioavailability is a critical pharmacological concept that measures the extent and rate at which an active drug ingredient or therapeutic moiety enters the systemic circulation, remaining unchanged. It's a pivotal factor in determining a drug's efficacy and safety.The Biopharmaceutics Classification System (BCS) plays an essential role in drug development by categorizing drugs into four classes based on their solubility and permeability. This classification aids in understanding drug...
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Bioavailability Enhancement: Drug Permeability Enhancement01:27

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Body:After oral administration, poor permeability often limits the rate at which drugs are absorbed through the intestinal epithelium. Enhancing drug permeability is crucial for effective therapy, and several strategies have been developed to overcome this challenge.One effective strategy involves the use of lipid-based formulations. These formulations enhance dissolution and solubility, targeting physiological mechanisms to increase drug absorption. This includes stimulating bile salt...
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Bioavailability Enhancement: Drug Solubility Enhancement01:16

Bioavailability Enhancement: Drug Solubility Enhancement

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Body:Bioavailability is a critical factor in determining a drug's effectiveness. It refers to the proportion of a drug that enters the circulation when introduced into the body and is, as a result, able to have an active effect. Enhancing bioavailability is essential for drugs with poor solubility, as it can significantly impact their therapeutic efficacy. Various methods are employed to increase the solubility of drugs, thereby enhancing their bioavailability.Micronization and nanonization are...
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Bioavailability Enhancement: Drug Stability Enhancement and GI Retention01:05

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Body:Improving a drug's stability in the gastrointestinal (GI) tract is paramount for enhancing its bioavailability and therapeutic effectiveness. Various strategies are employed to protect the drug from the harsh gastric milieu and to ensure its release and absorption at the desired site within the GI tract.Polymer coatings are one such method used to shield drugs from the stomach's acidic environment. By preventing premature drug release, these coatings improve the bioavailability of unstable...
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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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Routes of Drug Administration: Enteral01:18

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Medications can be administered through the enteral route using liquids, capsules, or tablets.
Enteral administration involves drug administration via the mouth in two ways: orally or sublingually.
Unlike sublingually drugs, drugs that are taken orally pass through the gastrointestinal (GI) tract and get metabolized by the liver. Once metabolized, the drug is absorbed into the systemic circulation, reaching different body parts via the bloodstream. However, while passing through the stomach,...
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Enhancing oral absorption in animals.

P J Crowley1, L G Martini

  • 1SmithKline Beecham Pharmaceuticals, New Frontiers Science Park, Harlow, Essex, CM19 5AW, UK. Patrick_J_Crowley@sbphrd.com

Current Opinion in Drug Discovery & Development
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Summary
This summary is machine-generated.

Optimizing drug absorption in animal studies requires special formulation strategies. This review covers physicochemical and physiological approaches to enhance drug delivery and bioavailability.

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Area of Science:

  • Pharmacology
  • Drug Delivery
  • Animal Research

Background:

  • Optimizing absorption in animal studies presents unique challenges, often requiring higher doses than for therapeutic effects to achieve dose-response linearity and high tissue exposure.
  • Investigational molecular constructs may possess properties that hinder efficient absorption, necessitating pre-treatment or specialized formulation.
  • There is growing interest in novel non-invasive routes for delivering medicinal agents.

Purpose of the Study:

  • To review physicochemical approaches for enhancing drug absorption.
  • To discuss strategies that leverage or counteract physiological processes for improved delivery.
  • To highlight current trends in non-invasive drug delivery methods for animal studies.

Main Methods:

  • Review of physicochemical formulation strategies for absorption enhancement.
  • Analysis of physiological approaches to modulate drug absorption.
  • Discussion of novel non-invasive delivery routes.

Main Results:

  • Physicochemical modifications can significantly improve the absorption of drug candidates.
  • Understanding and manipulating physiological processes offer alternative pathways for absorption enhancement.
  • Non-invasive delivery methods show promise for improving drug administration in animal models.

Conclusions:

  • Effective absorption optimization in animal studies often requires tailored formulation and pre-treatment strategies.
  • Both physicochemical and physiological approaches are valuable for enhancing drug absorption.
  • Exploration of non-invasive delivery routes is a key area for future research in preclinical drug development.