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Related Concept Videos

Bioavailability Enhancement: Drug Permeability Enhancement01:27

Bioavailability Enhancement: Drug Permeability Enhancement

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 secretion,...
Site-Targeted Drug Delivery Systems: Polymeric Carriers01:24

Site-Targeted Drug Delivery Systems: Polymeric Carriers

Polymeric carriers enhance targeted drug delivery by increasing efficacy while minimizing off-target effects. These carriers comprise a biodegradable polymeric backbone integrated with functional elements that enable targeting, improve physicochemical properties, and regulate drug release.Targeting MechanismsThe targeting ability of polymeric carriers is mediated by a homing device, which is a molecular recognition component designed to selectively bind to specific tissues or cells. Monoclonal...
Non-Oral Extravascular Drug Absorption Routes01:15

Non-Oral Extravascular Drug Absorption Routes

Non-oral extravascular routes, which encompass sublingual, buccal, topical, intramuscular, and inhalation methods, primarily utilize passive diffusion to transport drugs into the systemic circulation. The absorption rates and effectiveness of these routes depend on the drug's physicochemical properties, as well as the patient's anatomical and pathophysiological state.
Lipophilic drugs that are stable at salivary pH (6) and exhibit minimal binding to the oral mucosa are absorbed more effectively...
Transdermal Drug Delivery Systems01:18

Transdermal Drug Delivery Systems

Transdermal drug delivery systems (TDDS) enable the controlled release of drugs across the skin into systemic circulation. They are particularly advantageous for drugs with short half-lives or narrow therapeutic indices, as they maintain consistent plasma concentrations and reduce the risk of subtherapeutic or toxic levels.TDDS are categorized into monolithic, reservoir, and mixed systems. Monolithic systems embed the drug in a polymer matrix, where diffusion governs release. Reservoir systems...
Bioavailability Enhancement: Drug Stability Enhancement and GI Retention01:05

Bioavailability Enhancement: Drug Stability Enhancement and GI Retention

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

Bioavailability Enhancement: Determination and Conceptual Approaches in Overcoming Bioavailability Problems

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 absorption...

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Construction of Cyclic Cell-Penetrating Peptides for Enhanced Penetration of Biological Barriers
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Percutaneous penetration enhancers: an overview.

H-Y Thong1, H Zhai, H I Maibach

  • 1Department of Dermatology, School of Medicine, University of California, San Francisco, CA 94143-0989, USA.

Skin Pharmacology and Physiology
|August 25, 2007
PubMed
Summary

Transdermal drug delivery utilizes technological advances for controlled drug release through the skin. This review explores physical, biochemical, and chemical methods to enhance skin penetration for effective systemic drug levels.

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Area of Science:

  • Pharmaceutical Sciences
  • Dermatology
  • Biotechnology

Background:

  • Transdermal drug delivery offers controlled systemic drug release via skin permeation.
  • Recent decades have seen significant advancements in enhancing percutaneous drug penetration.
  • Understanding penetration enhancement is crucial for effective transdermal therapies.

Purpose of the Study:

  • To provide a comprehensive overview of penetration enhancement techniques in transdermal drug delivery.
  • To classify and explain the mechanisms of chemical penetration enhancers.
  • To discuss current trends and future developments in the field.

Main Methods:

  • Review of physical, biochemical, and chemical penetration enhancement strategies.
  • Classification and mechanistic analysis of chemical penetration enhancers.
  • Exploration of applications in transdermal drug delivery systems.

Main Results:

  • Detailed examination of various penetration enhancement methods.
  • Elucidation of the classification and mechanisms of chemical penetration enhancers.
  • Discussion of the application scope and future directions.

Conclusions:

  • Penetration enhancement is key to optimizing transdermal drug delivery efficacy.
  • Chemical enhancers play a significant role, with diverse mechanisms of action.
  • Continued innovation in penetration enhancement promises expanded therapeutic applications.