A device (1) for administering a powdered medicament to a patient by inhalation is described. The device (1) comprises a body (2), an internal housing (3) in the body (2), an inhalation channel (4), a mouthpiece (5), and a dose provisioning member (6). The dose provisioning member (6) comprises at least one cavity (7,7a,7b,7c) for accommodation of a powdered medicament, the dose provisioning member (6) further being enabled to adopt a first position in which the cavity (7,7a,7b,7c) is out of alignment with the inhalation channel (4) and a second position in which the cavity (7,7a,7b,7c) is in alignment with the inhalation channel (4). Each cavity (7,7a,7b,7c) is prefilled with a single dose (8,8a,8b,8c) of a powdered medicament,wherein the powdered medicament is solely stored in each cavity (7,7a,7b,7c) and the device (1) is free of a powder reservoir for storing a plurality of doses. A protective member (9) is provided within the housing (3), the protective member (9) being enabled to adopt a first position in which a part of the protective member (9) lies in the inhalation channel (4) such that the cross-section of the inhalation channel (4) is covered by a wall of the protective member (9) and to adopt a second position in which the protective member (9) does not lie in the inhalation channel (4) such that the cross-section of the inhalation channel (4) is not covered by a wall of the protective member (9).La présente invention décrit un dispositif (1) destiné à administrer un médicament en poudre à un patient par inhalation. Le dispositif (1) comprend un corps (2), un logement interne (3) situé dans le corps (2), un canal d'inhalation (4), un embout buccal (5), et un doseur (6). Le doseur (6) comporte au moins une cavité (7, 7a, 7b, 7c) destinée à contenir un médicament en poudre, le doseur (6) étant en outre capable d'adopter une première position selon laquelle la cavité (7, 7a, 7b, 7c) n'est pas alignée avec le canal d'inhalation (4) et une seconde position s
