An apparatus for administering medication to an administration site on the surface of a patient's heart, and this apparatus (10) comprises: a medication storage device (30) configured to be implanted within the patient's body, and the storage device is configured to store a plurality of solid state medication elements, each medication element comprising a medication； a flexible administration member (20) having a proximal end and a distal end； the proximal end is coupled to the medication storage device, and the administration member includes a lumen (21 and / or 22) for advancing the medication element through the administration member； an advance member configured to advance the medication element through the lumen of the administration member； and a receiving chamber (80) coupled to the distal end of the administration member； the reception chamber includes a housing (81) that has an internal volume (82) to receive the medication element； the housing includes at least one porous section (87) that allows the entry and exit of tissue fluids from the chamber； wherein the camera is configured to: (i) retain a medication item received from the administration member； (ii) dissolve the medication element in tissue fluids within the interior volume in order to form a medication solution； and (iii) administering the dissolved medicine through at least one porous section of the receiving chamber to the administration site； wherein at least one porous section includes a porous section that comes into contact with the tissue configured to come into contact with a surface of the heart in order to administer the medication solution to the administration site； and in which the porous section that comes into contact with the tissue is configured to bend and flex in order not to prevent a wall movement of a heart when it beats.Un aparato para la administración de medicación a un sitio de administración en la superficie del corazón de un paciente, y este aparato (10) comprende: un
