The present invention relates to an extended release pharmaceutical composition for oral administration comprising a therapeutically effective quantity of fesoterodine or a pharmaceutically acceptable salt, metabolite or derivative thereof, as an active ingredient, an effective quantity of glycerol dibehenate as a stabilizing agent in order to prevent the degradation and improve the physicochemical stability of the active ingredient in the finished dosage form and at least one pharmaceutically acceptable excipient as a rate controlling agent to modify/control the release of the active ingredient in the finished dosage form.
