An electrical feedthrough assembly for a leadless biostimulator, the electrical feedthrough assembly comprising: an electrode body (302, 700, 800, 1302, 1402, 1502, 1602, 1802) including an electrode wall (502, 1310, 1410, 1510, 1610, 1810) extending distally from an electrode base (504, 1312, 1412, 1512, 1612, 1812) around an electrode cavity (506, 1314, 1414, 1514, 1614, 1814) located on a longitudinal axis (108, 1324, 1424, 1524, 1624, 1824); an electrode tip (304, 1304, 1404, 1504, 1604, 1704, 1804) mounted on a distal end of the electrode body (302, 700, 800, 1302, 1402, 1502, 1602, 1802) and forming a distal tip end facing a surrounding environment and opposite a proximal tip end; a filler (416, 1316, 1416, 1516, 1616, 1816) in the electrode cavity (506, 1314, 1414, 1514, 1614, 1814) between the electrode base (504, 1312, 1412, 1512, 1612, 1812) and the electrode tip (304, 1304, 1404, 1504, 1604, 1704, 1804), wherein the filler (416, 1316, 1416, 1516, 1616, 1816) includes a therapeutic agent; the electrode tip (304, 1304, 1404, 1504, 1604, 1704, 1804) defining a tip hole (418, 1318, 1418) extending through the electrode tip along the longitudinal axis from the distal tip end to the proximal tip end; and the tip hole (418, 1318, 1418) is configured to deliver the therapeutic agent to the target tissue when the therapeutic agent elutes from the filler (416, 1316, 1416, 1516, 1616, 1816) and passes through the tip hole (418, 1318, 1418), characterized in that the tip hole (418, 1318, 1418) comprising a through hole having a first diameter at the distal tip end and a second diameter at the proximal tip end of the tip electrode, wherein the first diameter of the tip hole (418, 1318, 1418) is less than the second diameter of the tip hole (418, 1318, 1418). an electrode body (302, 700, 800, 1302, 1402, 1502, 1602, 1802) including an electrode wall (502, 1310, 1410, 1510, 1610, 1810) extending distally from an electrode base (504, 1312, 1412, 1512, 1612, 1812) around an electrode cavity (506, 1314, 1414, 1514, 1614, 1814) located on a longitudinal axis (108, 1324, 1424, 1524, 1624, 1824); an electrode tip (304, 1304, 1404, 1504, 1604, 1704, 1804) mounted on a distal end of the electrode body (302, 700, 800, 1302, 1402, 1502, 1602, 1802) and forming a distal tip end facing a surrounding environment and opposite a proximal tip end; a filler (416, 1316, 1416, 1516, 1616, 1816) in the electrode cavity (506, 1314, 1414, 1514, 1614, 1814) between the electrode base (504, 1312, 1412, 1512, 1612, 1812) and the electrode tip (304, 1304, 1404, 1504, 1604, 1704, 1804), wherein the filler (416, 1316, 1416, 1516, 1616, 1816) includes a therapeutic agent; the electrode tip (304, 1304, 1404, 1504, 1604, 1704, 1804) defining a tip hole (418, 1318, 1418) extending through the electrode tip along the longitudinal axis from the distal tip end to the proximal tip end; and the tip hole (418, 1318, 1418) is configured to deliver the therapeutic agent to the target tissue when the therapeutic agent elutes from the filler (416, 1316, 1416, 1516, 1616, 1816) and passes through the tip hole (418, 1318, 1418), characterized in that the tip hole (418, 1318, 1418) comprising a through hole having a first diameter at the distal tip end and a second diameter at the proximal tip end of the tip electrode, wherein the first diameter of the tip hole (418, 1318, 1418) is less than the second diameter of the tip hole (418, 1318, 1418).