Release-sustaining agent for drugs and sustained-release pharmaceutical comp osition

摘要

A sustainedly releasing agent for medicines comprising a non-crosslinked type anion-exchange resin represented by the general formula (I): wherein R1 represents aralkyl or alkyl, each of R2 and R3 represents lower alkyl, R4 represents a hydrogen atom or lower alkyl, X<-> represents a physiologically acceptable counter ion, n represents 1-3, and p represents a mean degree of polymerization, respectively, as well as a sustainedly released medicinal composition comprising the sustainedly releasing agent and a hypolipidemic agent.