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Modified-Release Drug Delivery Systems: Rate-Programmed I

Modified-Release Drug Delivery Systems: Rate-Programmed I

Rate-programmed drug delivery systems (DDS) are designed to release drugs at specific, controlled rates to maintain consistent therapeutic levels. These systems are categorized based on their release mechanisms, including dissolution-controlled DDS, diffusion-controlled DDS, and combined dissolution-diffusion-controlled DDS.In dissolution-controlled DDS, the release rate depends on the slow dissolution of the drug itself or the surrounding matrix. Drugs with inherently slow dissolution rates,...

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.
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Modified-Release Drug Delivery Systems: Rate-Programmed II

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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...

Drug Delivery: Parenteral Route

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The parenteral route is a critical method of drug administration. It delivers compounds directly into the systemic circulation and bypasses the gastrointestinal tract. This approach is particularly advantageous for drugs that exhibit poor absorption or instability when administered orally.
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Routes of Drug Administration: Overview

Routes of Drug Administration: Overview

Drug administration involves delivering drugs to the body through various routes, such as enteral, parenteral, and topical.
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A Point-of-Care Method with Integrated Decision Support Tool to Estimate Anemia at Population Level

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Aid delivery--time for a new approach?

¹harnett@webtribe.net

Medicine, Conflict, and Survival

|September 6, 2008

Summary

Foreign aid has not reduced global inequality in 30 years. This study examines government actions and proposes direct resource transfers to aid the world's poorest populations.

Area of Science:

Development Economics
International Relations
Public Policy

Background:

Despite decades of foreign aid, global inequalities persist.
The effectiveness of traditional aid models is questioned.
Addressing poverty requires re-evaluating resource distribution.

Purpose of the Study:

To analyze the reasons for aid ineffectiveness in reducing global inequality.
To investigate the roles of donor and recipient governments in aid outcomes.
To propose alternative mechanisms for direct resource transfer to the poorest.

Main Methods:

Qualitative analysis of government policies and actions.
Review of historical aid provision data.
Comparative case study approach (details not specified in abstract).

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Main Results:

Aid has not demonstrably reduced global economic disparities over 30 years.
Actions by both donor and recipient governments have contributed to the lack of progress.
Inefficiencies and misallocations hinder aid's impact.

Conclusions:

Current foreign aid structures are insufficient to tackle global inequality.
Direct resource transfers may offer a more effective solution.
Policy reforms are needed to improve aid efficacy and reach the poorest.