A metered liquid droplet inhaling device includes a chassis; a holder releasably connected to the chassis; a container in the holder having a chamber for a composition, an opening for expelling the composition, and a piston; a dose knob accessible outside the chassis for setting a dose to be expelled by accumulating a rotational force; a power supply mechanism for converting the rotational force into an axial force applied to the piston; an activation device connected to the power supply mechanism; a mouth piece connected to the container holder and having a mouth engaging area and an air opening; a droplet generator arranged in the mouth piece and having a plurality of through passing orifices in fluid communication with the opening of the container and with the mouth piece; and a rotation damping member connected to the power supply mechanism for damping an initial pressure peak inside the container.