Inhaler

An inhaler comprising a housing to receive a strip having a plurality of blisters, each blister having a puncturable lid and containing a dose of medicament for inhalation by a user, a mouthpiece mounted to the housing and through which a dose of medicament is inhaled by a user, a blister piercing member mounted for rotation about a first axis and an actuating mechanism including an actuating lever mounted for rotation about a second axis to sequentially move each blister into alignment with the blister piercing member, wherein the actuating lever cooperates with the blister piercing member so that the blister piercing member pivots about said first axis in response to rotation of the actuating lever from an initial position about the second axis to puncture the lid of an aligned blister so an airflow through the blister is generated to entrain the dose contained therein and carry it, via the mouthpiece, into the user's airway when a user inhales through the mouthpiece, wherein the inhaler further comprising an actuating lever load control member to control the force that must be applied to the actuating lever to cause it to rotate from the initial position such that a biasing force is applied to the actuating lever throughout all, or at least a substantial portion of, the stroke of the actuating lever, the load control member comprising a cantilever on the actuating lever and a ramp on the housing, said ramp being shaped to change the degree of deflection of the cantilever during the stroke of the actuating lever, wherein the ramp is shaped such that the load applied to the cantilever gradually increases until the blister piercing member begins to pivot about said first axis.