A metered liquid droplet inhaling device for delivering medicament, comprising: - an elongated tubular chassis having opposite distal and proximal ends; - a medicament container holder releasably connected to said chassis by first engagement means (20,22); - a medicament container arranged inside said medicament container holder, wherein said container comprises a tubular form having at least one chamber capable of containing a medicament composition, a proximal opening for allowing the medicament composition to be expelled therefrom, and at least one axially movable piston; - a dose knob accessible outside the distal end of the chassis for setting a dose to be expelled by accumulating a rotational force; - a power supply mechanism capable of converting the rotational force into an axial force to be applied to the piston and thereby create a pressure inside said medicament container; - activation means in mechanical connection to the power supply mechanism; - a mouth piece in mechanical connection to the proximal part of the container holder, where the mouth piece comprises a mouth engaging area and an air opening; - a droplet generator having a plurality of through passing orifices and arranged in the mouth piece, wherein the orifices are in fluid communication with the proximal opening of the container and with the mouth piece; characterised in that the device further comprises a rotation damping member in mechanical connection to the power supply mechanism for damping an initial pressure peak inside said medicament container, and wherein said rotation damping member comprises a proximal part rotationally connected to an arbor and a distal part protruding into a compartment in said dose knob, which compartment is filled with a highly viscous material. - an elongated tubular chassis having opposite distal and proximal ends; - a medicament container holder releasably connected to said chassis by first engagement means (20,22); - a medicament container arranged inside said medicament container holder, wherein said container comprises a tubular form having at least one chamber capable of containing a medicament composition, a proximal opening for allowing the medicament composition to be expelled therefrom, and at least one axially movable piston; - a dose knob accessible outside the distal end of the chassis for setting a dose to be expelled by accumulating a rotational force; - a power supply mechanism capable of converting the rotational force into an axial force to be applied to the piston and thereby create a pressure inside said medicament container; - activation means in mechanical connection to the power supply mechanism; - a mouth piece in mechanical connection to the proximal part of the container holder, where the mouth piece comprises a mouth engaging area and an air opening; - a droplet generator having a plurality of through passing orifices and arranged in the mouth piece, wherein the orifices are in fluid communication with the proximal opening of the container and with the mouth piece; characterised in that the device further comprises a rotation damping member in mechanical connection to the power supply mechanism for damping an initial pressure peak inside said medicament container, and wherein said rotation damping member comprises a proximal part rotationally connected to an arbor and a distal part protruding into a compartment in said dose knob, which compartment is filled with a highly viscous material.