The present invention discloses a method and device for dispersing powders and, in particular, to a method of dispersing inhaling powders in which a powder is positioned in a passage wherein the passage has one or more exits, one or more inlets and one or more obstructions to block the movement or to contain the powder within the device before use, whereupon a breaching pressure differential between the one or more exits and the one or more inlets of the passage is applied to breach the one or more obstructions so as to generate a flow through the passage which fully or partially aerosolizes the powder by means of the generated flow thus releasing a fully or partially aerosolized powder from the device.