Inhalation device for medically active liquids for generation of an aerosol, comprising - a housing, inside this housing a reservoir for storing a liquid, a pumping device with a pumping chamber for generation of a pressure inside said pumping chamber, wherein the pumping chamber is fluidically connected with the reservoir, a riser pipe which can be received with at least one reservoir-facing, interior end in said pumping chamber, and a nozzle which is connected liquid-tight to an exterior end of the riser pipe, wherein the interior volume of the pumping chamber is changeable by means of linear relative motion of the pumping chamber to the riser pipe, - and wherein said linear relative motion can be effected by a relative rotation of a rotatable part which is part of, or connected to, the housing with respect to a second part of said housing, such that said relative rotation is converted into said linear relative motion by means of a gear mechanism, - and wherein a means for the storage of potential energy is provided which is chargeable by means of said relative rotation, and wherein said energy is releasable to said pumping device when released by activation of a release means, - a blocking device which is adapted to block rotation of the rotatable part; wherein - the blocking device is adapted to be moveable between a blocking position and a non-blocking position, and wherein the blocking device is adapted to (a) move into the blocking position upon rotating the rotatable part by a predefined rotation angle, and (b) move into the non-blocking position upon activating the release means. - a housing, inside this housing a reservoir for storing a liquid, a pumping device with a pumping chamber for generation of a pressure inside said pumping chamber, wherein the pumping chamber is fluidically connected with the reservoir, a riser pipe which can be received with at least one reservoir-facing, interior end in said pumping chamber, and a nozzle which is connected liquid-tight to an exterior end of the riser pipe, wherein the interior volume of the pumping chamber is changeable by means of linear relative motion of the pumping chamber to the riser pipe, - and wherein said linear relative motion can be effected by a relative rotation of a rotatable part which is part of, or connected to, the housing with respect to a second part of said housing, such that said relative rotation is converted into said linear relative motion by means of a gear mechanism, - and wherein a means for the storage of potential energy is provided which is chargeable by means of said relative rotation, and wherein said energy is releasable to said pumping device when released by activation of a release means, - a blocking device which is adapted to block rotation of the rotatable part; wherein - the blocking device is adapted to be moveable between a blocking position and a non-blocking position, and wherein the blocking device is adapted to (a) move into the blocking position upon rotating the rotatable part by a predefined rotation angle, and (b) move into the non-blocking position upon activating the release means. (a) move into the blocking position upon rotating the rotatable part by a predefined rotation angle, and (b) move into the non-blocking position upon activating the release means.