Nanocrystallization - A Tool for Enhancement of Solubility and Dissolution Rate for Water Insoluble Drugs

Abstract

An innovative method to increase the solubility of water insoluble drug by using Nanocrystallization. Various factor like solubility, dissolution drug release, temperature, ph, have its effect on these process. Solubility is the ability of a substance, the solute, to form a solution with another substance, the solvent. Solutes are classified as highly soluble, sparingly soluble, or insoluble based on the concentration. Dissolution is ability of molecule to get break down in it. There are seven different types of dissolution apparatus defined in the United States Pharmacopeia (USP)-basket type, paddle type, reciprocating cylinder, and flow through cell, paddle over disc, rotating cylinder, and reciprocating disc. Drug release is when drug solutes migrate from the initial position in the polymeric system to the polymer's outer surface and then to the release medium. It is directly related to the drug stability. There are many mechanisms by which the drug release can be controlled in a system: dissolution, diffusion, osmosis, partitioning, swelling, erosion, and targeting. Drug Stabilizers are compounds, usually polysaccharides, which are added to products to provide and preserve structure, stability, and viscosity. Broadly there are 3 methods for the nanocrystallizationi.e. Bottom up technique, Top down technique and combination technique.