housing with a mouthpiece affixed and a cover for the mouthpiece the housing is adapted to hold a plurality of individual blister packs containing for example powdered medicament however the medication could be a liquid form medication the blisters are arranged such that individual blisters may be loaded into a clamping position whereupon the blister is pierced and a vibrating device is used to aggregate the contents of the blister which is subsequently inhaled by the user preferably the blisters are carried in a cartridge which in a preferred form comprises a rotary cassette containing a plurality of individually addressable blister packs the device also includes a mechanism for moving selected blister packs between a stowed position and an operative position the mechanism may also be used to activate the piercing and vibrating elements referring to fig1 a and 1b the inhaler of the present disclosure comprises a housing 1 having a mouthpiece 2 and a retractable cover 3 the device may also include a lever arm 11 the movement of which opens the retractable cover and activates other elements of the device as will be described in detail below the retractable cover may also be opened manually such as when the user desires to clean the mouthpiece but may not be closed when the lever arm 11 has been moved to an open position referring to fig2 a 2c the lever arm 11 is connected to a cam disk 10 contained within the housing which translates the rotational motion of the lever arm to translational or rotational motion of other internal elements of the device the device as shown is configured to allow the lever arm to turn 120 u00b0 which is a convention range of motion for operating the device with one hand but other ranges are.