1. Reusable drug delivery device for selecting and outputting a plurality of user-changeable doses of medicament comprising a body (10, 20), a cartridge holder (80) for holding the cartridge (81) containing a medicament, a rod (30) piston being movable with respect to the cartridge holder (80), the actuator (40) connected to the rod (30) of the piston, a display element (60) for indicating a predetermined dose connected to the housing (10, 20) and driven (40) clutch ( 90) for the rotary drive of the compound (40) with the housing (10, 20) whether a display element (60) and button (70), rotationally coupled to the coupling sleeve (90) and with a drive (40), wherein the device for delivery of a drug characterized by at least two of the following features: the actuator (40) is threadedly engagement with the rod (30) of the piston permanently attached to the button (70) and locked by rotation relative thereto, is axially moving with respect to the button (70) and comprises at least two separate components (41, 42) which are rotationally connected while the job is to PS and during dispensing dose, and which is rotationally decoupled during return the device to its original state, the display element (60) has a distal end provided with a (64) projecting inwardly threaded, and a proximal end provided with an inwardly projecting flange (66), and displaying element (60) comprises two separate components (61, 62), wherein the first component (61) comprises a thread (64) and the other component (62) comprises a flange (66), the button (70) comprises spikes (73) which engage corresponding drive grooves (40) for rotary button compound (70) with a drive (40), and which comprise latching elements (74) engaging1. Многоразовое устройство доставки лекарственного средства для выбора и выдачи множества изменяемых пользователем доз медикамента, содержащее корпус (10, 20), держатель картриджа (80) для удерживания картриджа (81), содержащего медикамент, шток (30) поршня, выполненный с воз
