An inhaler, particularly a powder inhaler, for administering a medicament in the form of inhalable substances, substance formulations or mixtures, with a mouthpiece (2) and a magazine that comprises a housing (3) having a plurality of cavities (32) for holding the medicament, the mouthpiece (2) being in flow connection with one of the cavities (32). The closed housing (3) has a cover (4) that covers at least one carrier (26, 27) comprising the unsealed cavities (32), the carrier (26, 27) being movable relative to the cover (4) for bringing a cavity (32) into flow connection with the mouthpiece (2).
