DISSOLUTION AND PRECIPITATION OF COCRYSTALS WITH IONIZABLE COMPONENTS

摘要

An approach to designing families of cocrystals with desired (tunable) pH dependent dissolution is developed. The solubility and dissolution rate of a family of cocrystals with the same API and a series of ligands that are weak acids or weak bases has been found to be determined and controlled by the acid or base dissociation constant of the ligand and the pH of the dissolution medium. In various aspects, pH dependent dissolution is imparted to a non-ionizable API or the dissolution of ionizable API's is modulated.