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Updated: Oct 17, 2025

Systemic and Local Drug Delivery for Treating Diseases of the Central Nervous System in Rodent Models
Published on: August 16, 2010
Controlled Drug Delivery Systems: Current Status and Future Directions.
Shivakalyani Adepu1, Seeram Ramakrishna1
1Center for Nanofibers and Nanotechnology, National University of Singapore (NUS), 21 Lower Kent Ridge Rd, Singapore 119077, Singapore.
Controlled drug delivery systems enhance therapeutic efficacy by overcoming limitations of conventional methods. This review explores advancements from nano-scale to intelligent systems for precise drug release.
Area of Science:
- Pharmaceutical Sciences
- Biomaterials Science
- Pharmacology
Background:
- Conventional drug delivery systems (tablets, capsules, etc.) exhibit poor bioavailability and fluctuating plasma drug levels.
- Inefficient drug delivery can compromise therapeutic outcomes and patient safety.
- Controlled drug delivery aims to optimize drug release kinetics and target specificity.
Purpose of the Study:
- To provide a comprehensive overview of drug delivery systems, emphasizing controlled release.
- To discuss the evolution of drug delivery from conventional to advanced nano- and intelligent systems.
- To highlight recent advancements, challenges, and future directions in the field.
Main Methods:
- Review of existing literature on drug delivery systems.
- Analysis of pharmacokinetic principles relevant to drug delivery.
- Discussion of design considerations, classifications, and applications of controlled drug delivery systems.
- Exploration of nano-drug delivery, targeted delivery, and smart drug delivery using stimuli-responsive biomaterials.
Main Results:
- Conventional systems have significant limitations in bioavailability and controlled release.
- Controlled drug delivery systems offer improved therapeutic efficacy and safety through precise drug release.
- Recent advancements include nano-scale, targeted, and intelligent drug delivery systems utilizing advanced biomaterials.
Conclusions:
- Controlled drug delivery is crucial for maximizing therapeutic efficacy and minimizing side effects.
- The field has evolved significantly, with nano- and intelligent systems showing great promise.
- Addressing current challenges is essential for the future development of advanced drug delivery technologies.
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