In an inhaler for administering a powdered medicament in the form of an inhalable substance, formulation or mixture of substances, a blister cavity to be opened by means of piercing elements (11) is mounted in a lower housing part (1) of a housing (2) that is made up of an upper housing part (6) in the form of a mouthpiece having an inhalation channel (16) and the lower housing part (1) comprising an air inlet opening (9). The inhalation channel (16) of the upper housing part (6) comprises a unit (15) for dispersing the powdered medicament, which is connected to the piercing elements (11), the upper housing part (6) being movable relative to the lower housing part (1) in order to open the blister cavity.本發明係關於用來投與呈可吸入物質、調配物或物質混合物形式之粉末狀藥劑之吸入器,在該吸入器中借助穿刺元件(11)打開之泡囊腔係安裝在殼體(2)之殼體下部(1)中,該殼體(2)係由呈吹口形式且具有吸入通道(16)之殼體上部(6)及包括空氣入口開口(9)之殼體下部(1)所組成。該殼體上部(6)之吸入通道(16)包括用來分散該粉末狀藥劑之單元(15),該單元與該穿刺元件(11)連接,該殼體上部(6)可相對於該殼體下部(1)移動以打開該泡囊腔。