Medical delivery device, comprising a rod element having a stem with a longitudinal axis, a first thread arrangement (35, 36), a proximal end and a distal end, a dial shell having a second thread arrangement, and a delivery orifice arranged adjacent to the proximal end of the stem of the rod element, wherein, in a dosing status of the medical delivery device, the first thread arrangement (35, 36) of the rod element and the second thread arrangement of the dial shell engage, and the rod element is movable along the longitudinal axis of its stem relative to the delivery orifice by rotating the dial shell around the stem of the rod element causing the first thread arrangement (35, 36) of the rod element and the second thread arrangement of the dial shell to travel along each other, wherein a dosage chamber is formed between the rod element and the delivery orifice which dosage chamber increases when the rod element moves away from the delivery orifice, characterized by further comprising a switching mechanism (7, 36) for changing the medical delivery device from the dosing status to a delivery status, wherein in the dosing status of the medical delivery device, moving the rod element along the longitudinal axis of its stem by applying an axial force to the rod element is prevented, and in the delivery status of the medical delivery device, the rod element is movable along the longitudinal axis of its stem relative to the delivery orifice by applying an axial force to the rod element, and moving the rod element along the longitudinal axis of its stem by rotating the dial shell around the stem of the rod element is prevented. a rod element having a stem with a longitudinal axis, a first thread arrangement (35, 36), a proximal end and a distal end, a dial shell having a second thread arrangement, and a delivery orifice arranged adjacent to the proximal end of the stem of the rod element, wherein, in a dosing status of the medical delivery device, the first thread arrangement (35, 36) of the rod element and the second thread arrangement of the dial shell engage, and the rod element is movable along the longitudinal axis of its stem relative to the delivery orifice by rotating the dial shell around the stem of the rod element causing the first thread arrangement (35, 36) of the rod element and the second thread arrangement of the dial shell to travel along each other, wherein a dosage chamber is formed between the rod element and the delivery orifice which dosage chamber increases when the rod element moves away from the delivery orifice, the first thread arrangement (35, 36) of the rod element and the second thread arrangement of the dial shell engage, and the rod element is movable along the longitudinal axis of its stem relative to the delivery orifice by rotating the dial shell around the stem of the rod element causing the first thread arrangement (35, 36) of the rod element and the second thread arrangement of the dial shell to travel along each other, wherein a dosage chamber is formed between the rod element and the delivery orifice which dosage chamber increases when the rod element moves away from the delivery orifice, a switching mechanism (7, 36) for changing the medical delivery device from the dosing status to a delivery status, wherein in the dosing status of the medical delivery device, moving the rod element along the longitudinal axis of its stem by applying an axial force to the rod element is prevented, and in the delivery status of the medical delivery device, the rod element is movable along the longitudinal axis of its stem relative to the delivery orifice by applying an axial force to the rod element, and moving the rod element along the longitudinal axis of its stem by rotating the dial shell around the stem of the rod element is prevented. the rod element is movable along the longitudinal axis of its stem relative to the delivery orifice by applying an axial force to the rod element, and moving the rod element along the longitudinal axis of its stem by rotating the dial shell around the stem of the rod element is prevented.