MICROPARTICLE AND PHARMACEUTICAL COMPOSITION THEREOF

摘要

Microparticles useful as DDS preparations are made by associating amphipathic polymers made of hydrophobic poly(hydroxy acid) segments and hydrophilic polysaccharide or polyethylene glycol segments having hydrophilic active substance-containing particles made by including a hydrophilic active substance that can efficiently seal in the hydrophilic active substance and that can release the hydrophilic active substance into the body at an appropriate rate.