Innovative Approaches to The Development of Prolonged-Release Dosage Forms

Abstract

Prolonged-release dosage forms are an important direction of modern pharmaceutical technology because they are designed to release an active pharmaceutical ingredient at a controlled rate for an extended period. Compared with conventional immediate-release medicines, prolonged-release systems can reduce dosing frequency, decrease fluctuations in drug concentration, and support better adherence to therapy. This article reviews contemporary technological approaches used in the development of prolonged-release dosage forms, with emphasis on matrix tablets, polymeric coatings, multiparticulate systems, osmotic systems, lipid-based carriers, and emerging technologies such as hot-melt extrusion and three-dimensional printing. The mechanisms of drug release, selection of excipients, manufacturing principles, quality control, advantages, limitations, and future prospects are discussed. A quality-by-design approach is also considered as an important framework for linking formulation and process variables with critical quality attributes. Modern technologies increasingly allow formulators to tailor release profiles to the physicochemical properties of active substances and the therapeutic requirements of patients. Nevertheless, reproducibility, dose dumping, stability, scale-up, regulatory requirements, and reliable in vivo–in vitro correlations remain important challenges. The development of prolonged-release medicines therefore requires an integrated combination of pharmaceutics, material science, process engineering, analytical control, and clinical considerations.