Inhaler

An inhaler comprising a housing having a mouthpiece through which a user may inhale a dose of medicament and a blister support member having a slot to receive a dose containing blister, the housing and the blister support member being pivotable relative to each other between a first position for insertion of a blister into said slot and, a second, pierced position, in which a blister piercing element carried by the housing pierces an inserted blister so that when a user inhales on the mouthpiece, the dose is entrained in an airflow and flows out of the blister through the mouthpiece and into the user's airway, wherein the housing comprises a substantially cylindrical chamber having an inlet at one end for the flow of drug laden air into the chamber from a pierced blister and an outlet at its opposite end for the flow of drug laden air out of the mouthpiece and into a patient's airway and wherein the blister support member is pivotally mounted within, and extends from, the housing to enable a user to pivot the blister support member relative to the housing into said second, pierced position so that a blister inserted into the slot and supported by the blister support member is pierced by said blister piercing element and the blister support member includes a lever portion that extends into a cut-out section formed in a wall of the housing and fills only a portion of the cut-out section in the wall of the housing such that the housing and the lever portion together define a recess therebetween, with the slot is located such that a blister tab of a blister received in the blister support member protrudes from said slot into said recess.