An inhaler housing is described having a body for receiving an inhaler canister and a mouthpiece through which a dose from the inhaler canister is to be delivered. The body and the mouthpiece are rotatably coupled so that by turning the mouthpiece relative to the body the inhaler housing is converted between a carry configuration in which the mouthpiece and body are mutually aligned, and a use configuration in which the mouthpiece projects laterally from the body. The inhaler housing has a member which is variably elastically deformed as the mouthpiece is turned, investing the member with elastic potential energy minima corresponding to the carry configuration and the use configuration. Rotation of the mouthpiece relative to the body tends to stop when either of these configurations is reached.
