BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for the preparation of delayed-acting pharmaceutical compositions comprising as carrier substance a mixture of microcrystalline cellulose with hydroxypropyl methylcellulose

摘要

A sustained release pharmaceutical composition comprising a pharmacologically active agent in admixture with a) microcrystalline cellulose and b) hydroxypropyl methylcellulose wherein the weight ratio of a) to b) is at least 1 to 1 is described. Aspirin is the preferred active agent.