Abstract

SOLID DISPERSIONS: A COMPREHENSIVE TOOL FOR OVERCOMING POOR DRUG SOLUBILITY

Swaraj Boddu, Harshit Kumar, Balwant Singh Rawat*, Vipin Kumar

Department of Pharmaceutical Sciences, GurukulaKangri (Deemed to be University), Haridwar, Uttarakhand. 249404

ABSTRACT

Improving the oral bioavailability of drugs administered in solid dosage forms remains a significant challenge for formulation scientists, primarily due to poor aqueous solubility. For drugs with low solubility, the rate at which they dissolve can often be the limiting step in their absorption within the gastrointestinal tract. Consequently, enhancing the dissolution rate of these compounds is crucial to improving their therapeutic effectiveness. One promising approach is the use of solid dispersion techniques, which have gained widespread attention for their ability to increase the dissolution rate of poorly water-soluble, lipophilic drugs. This method enhances bioavailability by decreasing particle size, increasing wettability, and converting the drug into an amorphous form, which generally dissolves more readily than its crystalline counterpart. Solid dispersions typically consist of at least two components: a hydrophobic drug and a hydrophilic inert carrier or matrix. The technique involves dispersing the drug in the carrier to form a solid product that improves drug release characteristics. This review explores the development of solid dispersion technology, including its classification, methods of preparation, and their respective advantages and limitations. In addition, it highlights recent progress in the field and provides insights into the selection of appropriate carriers and preparation techniques based on available data and practical considerations.

Keywords: Poorly soluble drugs; solid dispersion; solubility enhancement; bioavailability improvement.