Patent ID: 8128961

Claim:
A pharmaceutical composition for prolonged release of an active principle substance, said pharmaceutical composition comprising: a) microcapsules comprising non-agglomerated particles of said active principle substance having a coating of a film-forming substance, wherein said microcapsules comprise 96.0-99.2 wt. % of said active substance and 0.8-4 wt. % of said film-forming substance, said microcapsules being present in the amount of 99 wt. % of said composition; b) a lubricating substance in the amount of 0.1-1 wt. % of said composition; c) water in the amount of 0.1-3 wt. % of said composition; and d) 0.1 to 10 wt. % of a dispersant in the form of the active principle substance; wherein the active principle substance comprises aminoacetic acid.