Enhancing the Solubility of Poorly Soluble Drugs: Strategies and Advances in Pharmaceutical Formulations

The absorption, bioavailability, and therapeutic efficacy of pharmacologically active compounds are fundamentally dependent upon their solubility. Several newly synthesised compounds have inadequate water solubility, presenting a significant challenge, particularly for orally administered pharmaceuticals, as low solubility may result in reduced absorption and thus reduced therapeutic efficacy. Pharmaceutical research primarily tackles this issue, leading to the development of several solubility enhancement strategies. among the frequently examined techniques, solid dispersions exhibit significant potential. To enhance solubility and bioavailability, these formulations disperse poorly soluble pharmaceuticals within an inert medium. achieving uniform dispersion and maintaining stability is challenging. Nanocrystal technology, which provides a self-dispersing medication delivery system, has been extensively studied. Nanocrystals increase solubility and bioavailability by increasing surface area and dissolution rates. Their application has particularly facilitated the more effective dissolution of hydrophobic pharmaceuticals. A recognised method for enhancing water solubility is the creation of salt. Pharmacists have significantly advanced solubility and therapeutic outcomes by converting poorly soluble medications into their salt forms. Micronization enhances solubility by increasing the surface area available for dissolution, as it reduces medication particle size to the micron scale. Cyclodextrins, cyclic oligosaccharides, have demonstrated the ability to form inclusion complexes with hydrophobic pharmaceutical compounds when their solubility and stability are investigated. moreover, lipid-based formulations, such as amorphous solid dispersions and self-emulsifying drug delivery systems (SEDDS), are receiving heightened attention for their capacity to enhance solubility. Additionally, nanotechnology-based drug delivery utilising polymeric nanoparticles and liposomes is under investigated as a potential approach. These innovative techniques offer compelling strategies to enhance medication solubility, stability, and bioavailability.