EP1675576A1 — A method for preparing modified release pharmaceutical compositions

USPTO Abstract

A method for the preparation of a pharmaceutical particulate composition for modified release of one or more therapeutically, prophylactically and/or diagnostically active substances, the method involving spraying of a composition comprising an oily material on a solid composition in order to subject the solid composition to a controlled agglomeration process, whereby individual particles are aggregated into agglomerates in a controlled manner and a relatively small particle size and particle size distribution is obtained, the particulate composition comprising a sufficient amount of at least one release-rate modifying substance to provide a modified release of the active substance sufficient to provide duration of therapeutic, prophylactic and/or diagnostic effect of at least about 2 hours when the composition is exposed to an aqueous environment.