Novel microparticles containing active compound, media containing these, their use for the ultrasonically controlled release of active compounds and process for the production thereof

摘要

The invention relates to novel microparticles containing active compound, which, additionally to the active compound(s), contain at least one gas or gaseous phase, media (microparticulate systems) containing these particles, their use for the ultrasonically controlled in vivo release of active compound and process for the production of the particles and media.