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Modified-Release Drug Delivery Systems: Site-Targeted

Modified-Release Drug Delivery Systems: Site-Targeted

Site-targeted drug delivery systems enhance therapeutic efficacy while minimizing systemic toxicity and treatment costs. Unlike conventional methods, these systems ensure precise drug delivery, improving bioavailability and reducing side effects. Targeted drug delivery is classified into three levels. First-order targeting directs drugs to the capillary beds of specific organs or tissues. Second-order targets specific cell types, such as tumor cells, using receptor-mediated interactions.

Site-Targeted Drug Delivery Systems: Polymeric Carriers

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...

Modified-Release Drug Delivery Systems: Classification

Modified-Release Drug Delivery Systems: Classification

Modified-release drug delivery systems improve drug efficacy and minimize side effects by controlling the rate and location of drug release. These systems fall into three categories: rate-programmed, stimuli-activated, and site-targeted.Rate-programmed systems release drugs at a predetermined rate, maintaining consistent therapeutic levels and reducing fluctuations that could lead to toxicity or subtherapeutic effects. These systems use polymeric matrices, reservoir-based designs, or osmotic...

Modified-Release Drug Delivery Systems: Stimuli-Activated

Modified-Release Drug Delivery Systems: Stimuli-Activated

Stimuli-activated drug delivery systems are designed to release drugs in response to specific physical, chemical, or biological stimuli. These systems often utilize hydrogels—three-dimensional, hydrophilic polymer networks capable of swelling in aqueous environments and retaining significant fluid volumes. Upon exposure to particular stimuli, these hydrogels undergo structural transitions that allow the embedded drug to be released. Due to this adaptive behavior, such systems are also called...

Drug Delivery: Overview

Drug Delivery: Overview

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.
Enteral delivery involves administering drugs directly through swallowing, sublingual placement, or buccal application. Orally administered drugs predominantly navigate the gastrointestinal...

Factors Affecting Dissolution: Particle Size and Effective Surface Area

Factors Affecting Dissolution: Particle Size and Effective Surface Area

Dissolution kinetics, an essential aspect of oral drug delivery, is significantly influenced by the drug's particle size. According to the Noyes-Whitney dissolution model, the dissolution rate correlates directly with the drug's surface area. The larger the surface area, the higher the drug's solubility in water, leading to a faster drug dissolution rate. Reducing particle size increases the effective surface area, enhancing the dissolution process. Micronization and nanosizing are employed to...

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Updated: Jul 17, 2026

Manufacture and Drug Delivery Applications of Silk Nanoparticles

Manufacture and Drug Delivery Applications of Silk Nanoparticles

Published on: October 8, 2016

Nanostructure-mediated drug delivery.

Gareth A Hughes¹

¹Zyvex Corporation, Richardson, Texas, USA. ghughes@zyvex.com

Nanomedicine : Nanotechnology, Biology, and Medicine

|February 13, 2007

Summary

Nanotechnology enables advanced nanomedicine for personalized healthcare. Nanostructured drug carriers improve targeted delivery of therapeutics, reducing side effects and enhancing treatment efficiency.

Area of Science:

Biotechnology
Materials Science
Nanomedicine

Background:

Nanotechnology offers transformative potential across diverse industries, including semiconductors, manufacturing, and biotechnology.
Advanced nanoscale characterization and manipulation tools are crucial for understanding and fabricating novel materials.
Nanomedicine represents a significant societal impact, promising personalized healthcare, rational drug design, and targeted drug delivery.

Purpose of the Study:

To review the development of nanoscale drug delivery mechanisms.
To highlight the capabilities of nanostructured drug carriers for various therapeutic agents.
To emphasize the benefits of targeted delivery in reducing systemic side effects and improving drug efficacy.

Main Methods:

Review of current research and development in nanostructured drug delivery systems.

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Facile Preparation of Internally Self-assembled Lipid Particles Stabilized by Carbon Nanotubes

Facile Preparation of Internally Self-assembled Lipid Particles Stabilized by Carbon Nanotubes

Published on: February 19, 2016

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Last Updated: Jul 17, 2026

Manufacture and Drug Delivery Applications of Silk Nanoparticles

Manufacture and Drug Delivery Applications of Silk Nanoparticles

Published on: October 8, 2016

Facile Preparation of Internally Self-assembled Lipid Particles Stabilized by Carbon Nanotubes

Facile Preparation of Internally Self-assembled Lipid Particles Stabilized by Carbon Nanotubes

Published on: February 19, 2016

Analysis of nanocarrier capabilities for small molecules, nucleic acids, and proteins.

Examination of strategies for achieving site-specific drug delivery within the body.

Main Results:

Nanostructured carriers facilitate the delivery of diverse therapeutic payloads, including small molecules, nucleic acids, and proteins.
Targeted delivery mechanisms enable precise drug localization within the body.
The use of nanocarriers can significantly reduce unwanted systemic side effects associated with conventional therapies.

Conclusions:

Nanoscale drug delivery systems are pivotal in advancing nanomedicine.
Targeted delivery via nanocarriers enhances therapeutic outcomes and patient safety.
Continued development in this field promises more efficient and personalized medical treatments.