An inhaler includes a main body having a canister housing, a medicament canister retained in a central outlet port of the canister housing, and a dose counter having an actuation member for operation by movement of the medicament canister. The canister housing has an inner wall, and a first inner wall canister support formation extending inwardly from a main surface of the inner wall. The canister housing has a longitudinal axis X which passes through the center of the central outlet port. The first inner wall canister support formation, the actuation member, and the central outlet port lie in a common plane coincident with the longitudinal axis X such that the first inner wall canister support formation protects against unwanted actuation of the dose counter by reducing rocking of the medicament canister relative to the main body of the inhaler.

An inhaler for inhaling medicament includes a body for retaining a medicament store and a dose counter. The dose counter has a moveable actuator and a chassis mounted on the body. The chassis is heat staked in position on the body.

A dose counter for an inhaler, the dose counter having a display tape arranged to be incrementally driven from a tape stock bobbin onto an incremental tape take-up drive shaft, the bobbin having an internal bore supported by and for rotation about a support shaft, at least one of the bore and support shaft having a protrusion which is resiliently biased into frictional engagement with the other of the bore and support shaft with longitudinally extending mutual frictional interaction.

This drug-supplying device is provided with: a rotator that discharges drugs towards the outer diameter by being rotated; a drug shape-specifying unit for specifying the shape of the drug; and a control unit that rotates the rotator at a rotational speed specified, on the basis of a speed table that correlates drug shape to rotator rotational speed, by the shape that has been specified by a drug-detecting unit.

A dose counter for counting doses of medicament dispensed by or remaining in a metered-dose inhaler. The dose counter includes: a rotatably mounted gear wheel having a circular arrangement of ratchet teeth; a display coupled to the gear wheel, the display having a visible array of dose counting indicia indexable in response to rotary motion of the gear wheel; and an actuator mechanism having a driver for rotatably driving the gear wheel in response to the dispensation of a medicament dose, the driver being arranged to engage the ratchet teeth of the gear wheel. The actuator mechanism includes a pivotally mounted lever having an input portion. The lever is arranged to amplify a linear stroke at the input portion such that a linear stroke of the driver exceeds the linear input stroke. By amplifying the stroke, the risk of undercounting due to insufficient stroke length may be reduced.

A method of assembling an inhaler for inhaling medicament, the inhaler having a body for retaining a medicament store and a dose counter having a moveable actuator and a chassis mounted on the body, the method including heat staking the chassis of the dose counter onto the body.