Dose counter for a metered-dose inhaler

A method of counting doses dispensed from a metered-dose inhaler, the dose counter including:

• 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 including a pivotally mounted lever having an input portion and further including 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, wherein the input portion of the lever is arranged between the pivotal mounting and an output portion of the lever,
• said method comprising depressing a medicament canister to engage the input portion of the lever, to thereby cause the driver to rotatably drive the gear wheel, wherein a linear input stroke at the input portion of the lever is amplified such that a linear stroke of the driver exceeds the linear input stroke.