PLGA/PLA microparticulate system: A boon for hydrophobic drug delivery.

ABSTRACT

Controlling In-vitro drug release profiles for a system of PLGA/PLA microparticles encapsulating a hydrophobic drug. Challenges with the diversity of drug properties, microencapsulation methods, are evaluated with a focus on decreasing the time to lab-scale encapsulation of water-insoluble drug candidates in the drug development stage. The development of biodegradable microparticles systems that combined the beneficial properties of polymeric microparticles for hydrophobic drug delivery were reviewed here. Injectable biodegradable and biocompatible copolymers of lactic and glycolic acid are important advanced delivery system for week too month controlled release of hydrophobic drug (e.g., from biopharmaceutical classification system class IV), which often display poor oral bioavailability. Finally, three important properties affecting release behavior were identified as polymer hydrophobicity, particle size and particle coating, . This review focuses on the microencapsulation of hydrophobic drugs, describes a variety of techniques for their preparation and analytics.