The present invention relates to a controlled-release pharmaceutical formulation comprising at least one active ingredient dispersed in a matrix comprising at least one slow-release excipient comprising an association of at least one glycogen and at least one alginate with alkaline-earth metal salts, and a process for its preparation. The invention also relates to a slow-release excipient comprising an association of at least one glycogen and at least one alginate with alkaline-earth metal salts, and the process for its preparation, and its use for the preparation of slow-release pharmaceutical formulations. WO2009083561A1
