Solid solutions are similar to liquid solutions and consist of a single phase irrespective of the number of components. A solid solution of a poorly water-soluble drug dissolved in a carrier is particularly interesting in improving oral bioavailability. In a solid solution, the drug’s particle size has been reduced to its molecular dimensions resulting in a more rapid dissolution rate. By judicious selection of a carrier, the dissolution rate of the drug can be increased by up to several orders of magnitude. In a solid solution, the drug’s particle size has been reduced to its molecular dimensions resulting in a more rapid dissolution rate.

This whitepaper compares solubility enhancement between spray drying and hot melt extrusion for a poorly soluble, new active pharmaceutical ingredient.