Compliance monitor for loosely coupling to an inhaler

A compliance monitor for monitoring patient usage of a medicament delivery device, said medicament delivery device including a store of medicament and an actuator, and the compliance monitor including:

• a housing adapted to enclose said medicament delivery device,
• a dose counter, associated with said housing, for recording the delivery of a dose of medicament to a patient from the medicament delivery device,
• said housing is loosely coupled to said medicament delivery device, whereby said housing is able to move relative to said medicament delivery device during the delivery of the dose of medicament, and such movement is configured to actuate the dose counter, either directly or indirectly, in order to record the delivery of said dose of medicament;
• and
• a detector that is configured to detect when the store of medicament, of the medicament delivery device, is inserted into and/or removed from the housing,
• the housing including:
• a main body portion, and
• a door, the door movably attached to the main body portion, and
• the door being movable between an open position and a closed position, and wherein the door, when open, allows for the medicament delivery device to be placed within and removed from the main body portion;
• and
• wherein the housing includes:
• the main body portion having an aperture defined therein and through which a mouthpiece, of the medicament delivery device, extends such that the mouthpiece, of the medicament delivery device, protrudes from the aperture to deliver the medicament directly to the patient.