The present invention provides a dry-powder inhaler device comprising: a casing an air inlet located at a first terminus of the casing a powder delivery port located at a second terminus of the casing, which is positioned distal to the air inlet and an elongated assembly located within an interior of the casing. A first terminus is located proximally to the air inlet, a second terminus is located proximally to the powder delivery port, and the assembly is fitted within the casing such that said assembly partially rotates therein about a single axis. The assembly has at least one compartment containing dry-powder, which is located proximally to the second terminus. The compartment with a dry-powder comprises a porous structure encasing the dry-powder whereby airflow through the device causes the assembly to partially rotate within the casing about a single axis and release the dry-powder in the airflow.
