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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...

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Rate-programmed drug delivery systems release drugs in a controlled manner to maintain therapeutic levels. Three main designs include reservoir, matrix, and hybrid systems.Reservoir systems consist of a drug core enclosed within a membrane that controls drug release. In non-swelling reservoir systems, polymers like ethyl cellulose or polymethacrylates are used. These do not hydrate in aqueous media and control release through membrane thickness, porosity, or insolubility. This type includes...

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Changes in polymorphic forms can significantly influence the bioavailability of poorly soluble drugs. Although the FDA defines pharmaceutical equivalence based on having the same active ingredient, dosage form, and route of administration, it does not automatically disqualify products with different polymorphic forms. This means two products with different polymorphs can still be deemed pharmaceutically equivalent. However, polymorphic differences can affect properties like wettability,...

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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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Related Experiment Video

Updated: Mar 25, 2026

Preparation and Characterization of Individual and Multi-drug Loaded Physically Entrapped Polymeric Micelles

Preparation and Characterization of Individual and Multi-drug Loaded Physically Entrapped Polymeric Micelles

Published on: August 28, 2015

Polymer Particulates in Drug Delivery.

Harmeet Kaur, Virender Kumar, Krishan Kumar

¹Room No. 9, IGVB-South Block, College of Pharmacy, University of Health Sciences, Rohtak- 124001, India. jasbirsinghsekhon@yahoo.co.in.

Current Pharmaceutical Design

|February 23, 2016

Summary

Polymeric microparticles and nanoparticles offer advanced drug delivery solutions. Engineering polymer properties enhances drug loading, release, and targeting for improved therapeutic outcomes.

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Preparation and Characterization of Individual and Multi-drug Loaded Physically Entrapped Polymeric Micelles

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Area of Science:

Polymer science and materials engineering
Pharmaceutical sciences
Biomedical engineering

Background:

Conventional drug delivery methods face limitations in efficacy and targeting.
Polymer particulates (micro- and nanoparticles) present novel solutions for drug delivery.
Tailoring polymer properties allows for optimization of drug loading, release kinetics, and pharmacokinetics.

Purpose of the Study:

To review the application of polymeric microparticles, nanoparticles, and copolymer micelles in drug and biomolecule delivery.
To discuss the formulation methods for polymer particulates.
To cover well-established polymers in pharmaceutical history for drug delivery applications.

Main Methods:

Review of existing literature on polymeric drug delivery systems.
Analysis of polymer engineering strategies for enhanced drug delivery.
Discussion of formulation techniques for micro- and nanoparticles.

Main Results:

Polymeric particles can be engineered to improve drug loading, control release rates, and enhance pharmacokinetics.
Ligand modification of polymer end-groups enables cell-specific targeting and improved intracellular delivery.
Various polymeric materials and formulation methods are suitable for diverse drug delivery applications.

Conclusions:

Polymer particulates are versatile platforms for developing effective drug delivery systems.
Precise engineering of polymers and their formulations is key to overcoming conventional delivery challenges.
This review highlights the potential of polymeric systems for advanced drug and biomolecule delivery.