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Oral Drug Delivery Systems: Continuous-Release Systems

Oral Drug Delivery Systems: Continuous-Release Systems

Continuous-release drug delivery systems offer a strategic approach to maintaining therapeutic drug levels over extended periods following oral administration. By modulating the release rate of active pharmaceutical ingredients, these systems minimize fluctuations in plasma concentrations, which enhances clinical efficacy and reduces the need for frequent dosing. Such characteristics make them particularly advantageous in managing chronic diseases where patient adherence and stable drug...

Drug Delivery Systems: Different Types

Drug Delivery Systems: Different Types

Conventional oral drug products, termed immediate-release (IR) formulations, are engineered to promptly release their active pharmaceutical ingredient (API) upon ingestion, typically in tablets or capsules. This rapid release often results in swift drug absorption and consequent pharmacodynamic effects, although the timing and intensity can vary depending on the drug's properties. Prodrugs within these formulations require metabolic conversion to activate their pharmacodynamic effects,...

Modified-Release Drug Delivery Systems: Drug Release Characteristics

Modified-Release Drug Delivery Systems: Drug Release Characteristics

Drug release from modified-release dosage forms is designed to achieve specific therapeutic effects by controlling the rate and extent of drug release. The classification of these drug release systems is based on key pharmacokinetic assumptions: drug disposition follows first-order kinetics, drug release is the rate-limiting step in absorption, and the released drug is rapidly and completely absorbed.There are four major models of drug release patterns. The first model is the slow zero-order...

Modified-Release Drug Delivery Systems: Rate-Programmed II

Modified-Release Drug Delivery Systems: Rate-Programmed II

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...

Modified-Release Drug Delivery Systems: Overview

Modified-Release Drug Delivery Systems: Overview

Modified-release dosage forms are designed to address the limitations of drugs with short biological half-lives. These forms maintain stable therapeutic drug concentrations over extended periods, reducing the need for frequent dosing. A consistent drug level helps minimize peak-trough fluctuations, which can reduce adverse effects, lower the risk of drug resistance, and improve overall treatment effectiveness.One common type of modified-release form is the extended-release (ER) formulation. ER...

Oral Drug Delivery Systems: Introduction

Oral Drug Delivery Systems: Introduction

Oral drug delivery is the most common route of administration due to its convenience, cost-effectiveness, and high patient compliance. It enables precise formulation to ensure proper drug dosage and bioavailability. The development of oral dosage forms considers drug properties such as solubility, stability, and absorption to optimize therapeutic efficacy.Tablets, capsules, liquids, and chewable formulations enhance drug stability, mask undesirable tastes, and improve patient experience.

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[Oral controlled release dosage forms].

Els Mehuys¹, Chris Vervaet

¹Laboratorium Farmaceutische Technologie, Faculteit Farmaceutische Wetenschappen, Gent. els.mehuys@ugent.be

Journal De Pharmacie De Belgique

|July 14, 2010

Summary

This summary is machine-generated.

This review covers oral drug delivery systems that control how medicines are released over time. It details sustained, postponed, and targeted release technologies available on the market.

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Area of Science:

Pharmaceutical Sciences
Drug Delivery Systems
Pharmacokinetics

Context:

Oral dosage forms are the most common route for drug administration.
Controlling drug release is crucial for optimizing therapeutic efficacy and patient compliance.
Existing technologies aim to modify drug release profiles from oral formulations.

Purpose:

To review and categorize various technologies for controlled drug release from oral dosage forms.
To provide an overview of available oral controlled release dosage forms.
To highlight different strategies for regulating drug release in the gastrointestinal tract.

Summary:

Drug release from oral dosage forms can be controlled through sustained release (slow release over time), postponed release (delayed release until the intestine, e.g., enteric coating), and targeted release (site-specific delivery within the GI tract).
This article examines the diverse range of oral controlled release dosage forms currently available on the market.
Various technological approaches are employed to achieve these controlled release profiles.

Impact:

Informs pharmaceutical scientists and formulators about existing oral controlled release technologies.
Aids in the selection and development of appropriate dosage forms for specific therapeutic needs.
Contributes to the understanding of advanced drug delivery strategies for improved patient outcomes.