Author: Dr. Sneha Kapoor, Dr. Rajeev Nair
Abstract: Controlled release (CR) formulations have emerged as a pivotal strategy in modern pharmaceutics, aiming to optimize therapeutic efficacy while improving patient compliance. By modulating drug release over extended periods, CR systems maintain plasma drug levels within the therapeutic window, minimize side effects, and reduce dosing frequency. This paper reviews the principles of controlled release formulation, various strategies including matrix, reservoir, and osmotic systems, and their applications in oral, transdermal, and parenteral routes. Key formulation challenges such as drug stability, release kinetics, and manufacturing considerations are discussed. Analytical characterization techniques and case studies highlight successful CR systems. Future trends integrating nanotechnology, polymeric innovations, and personalized medicine are also explored to enhance therapeutic outcomes.
Keywords: Controlled release, Sustained release, Drug delivery, Matrix systems, Reservoir systems, Osmotic systems, Therapeutic efficacy.
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