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release is controlled by various mechanisms2. 1. Rate pre-programmed drug delivery systems. • Polymer membrane permeation-controlled drug delivery systems. • Polymer matrix diffusion-controlled drug delivery systems. • Microreservoir partition-controlled drug delivery systems. 2. Activation-modulated drug delivery
Mar 18, 2013 CLASSIFICATION Rate pre-programmed drug delivery systems Activation – modulated drug delivery systems Feedback- regulated drug delivery systems Site- targeting drug delivery systems 2; 3. ACTIVATION MODULATED DDS Drug delivery is activated and controlled by physical, chemical or
controlled-release drug delivery systems (CrDDSs) that have been marketed so far, or that are under active development, the CrDDSs can be classified (Fig. 2) as follows: 1. Rate-preprogrammed drug delivery systems. 2. Activation-modulated drug delivery systems. 3. Feedback-regulated drug delivery systems. 4.
Jan 13, 2016 The paper deals with the stable drug delivery system. KEYWORDS: Controlled release, dose size, drug delivery, physical process, enzyme activated system, self-regulated drug delivery system. INTRODUCTION. The science of controlled release was first originated from the development of oral sustained.
The release of drug substances from a controlled release drug delivery system gains at a rate profile that is not only predictable kinetically but also reproduced from one unit to another. They are classified as follows. I. Rate- preprogrammed drug delivery system. II. Activation – Modulated drug delivery system. III.
Based on their technical sophistication – controlled drug delivery systems can be classified into. 1. Rate – pre programmed drug delivery systems. 2. Activation modulated drug delivery systems. 3. Feed back regulated drug delivery systems. 4. Site-targeting drug delivery systems. Advantages of Controlled Release Dosage.
L INTRODUCTION In Chapter 1 the concept of rate-controlled drug delivery was introduced. This laid the foundation for the development of various.
Another class of modulated drug delivery systems are those in which pulsatile release of drugs is ERY SYSTEMS -. Ultrasonically modulated systems: Ultrasonication has been employed to modulate re- peated release of drug from ultrasonic controlled polymeric .. Activation is based on the reversible inactivation.
Download as Powerpoint Presentation (.ppt), PDF File (.pdf), Text File (.txt) or view presentation slides online. 1) 2) 3) 4) Rate pre-programmed drug delivery systems Activation-modulated drug delivery systems Feed back-regulated drug delivery systems Site-targeting drug delivery systems. ACTIVATION MODULATED
Apr 10, 2011 Journal of Applied Pharmaceutical Science 01 (02); 2011: 38-49. 1. Activation modulated drug delivery system. 2. Feed back regulated drug delivery system. 3. Site specific drug delivery system. Activation modulated drug delivery system. In this group of CRDDS the release of drug molecule from the drug

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February 2018