Inhaler

An inhaler comprising a housing defining a chamber to receive a strip having a plurality of blisters each containing a dose of medicament for inhalation by a user, a cap, an actuating member which has a gear element having teeth, and a blister strip indexing wheel rotatably mounted in the chamber to sequentially move each blister into a blister opening position, wherein the cap and the actuating member are combined into a single component and wherein the blister strip indexing wheel and the cap are coupled by a drive gear that cooperates with the gear element to effect rotation of the blister strip indexing wheel in response to rotation of the cap, said drive gear and gear element being disposed on an outside of the housing remote from the chamber.