A dose counter for counting doses of medicament dispensed by or remaining in a metered-dose inhaler, the dose counter comprising: a rotatably mounted first gear wheel having a circular arrangement of ratchet teeth; a display coupled to the first gear wheel, the display having a visible array of dose counting indicia indexable in response to rotary motion of the first gear wheel; and an actuator mechanism having a first ratchet drive pawl for engaging the ratchet teeth of the first gear wheel in response to the dispensation of a medicament dose, wherein the actuator mechanism further comprises a second ratchet drive pawl for engaging the ratchet teeth of a gear wheel coupled to the display, and wherein the actuator mechanism is configured such that, in use of the dose counter for counting a dispensed dose, a first ratchet tooth of the first gear wheel is engaged and rotatably driven by the first ratchet drive pawl and then a second ratchet tooth of the gear wheel coupled to the display is engaged and rotatably driven by the second ratchet drive pawl, wherein the gear wheel arranged for engagement by the second ratchet drive pawl is the first gear wheel, wherein the first and second ratchet drive pawls (242, 244) are defined by a unitary driving member, the driving member being pivotally mounted such that only one of the first and second ratchet drive pawls can be brought into engagement with a ratchet tooth of the gear wheel at any one time, and wherein the actuator mechanism further comprises an actuator shaft mounted for linear reciprocating movement in response to the dispensing of a dose of medicament, characteirised in that the driving member is pivotally mounted to the actuator shaft such that the reciprocating movement of the actuator shaft causes a rocking movement of the driving member. a rotatably mounted first gear wheel having a circular arrangement of ratchet teeth; a display coupled to the first gear wheel, the display having a visible array of dose counting indicia indexable in response to rotary motion of the first gear wheel; and an actuator mechanism having a first ratchet drive pawl for engaging the ratchet teeth of the first gear wheel in response to the dispensation of a medicament dose, wherein the actuator mechanism further comprises a second ratchet drive pawl for engaging the ratchet teeth of a gear wheel coupled to the display, and wherein the actuator mechanism is configured such that, in use of the dose counter for counting a dispensed dose, a first ratchet tooth of the first gear wheel is engaged and rotatably driven by the first ratchet drive pawl and then a second ratchet tooth of the gear wheel coupled to the display is engaged and rotatably driven by the second ratchet drive pawl, wherein the gear wheel arranged for engagement by the second ratchet drive pawl is the first gear wheel, wherein the first and second ratchet drive pawls (242, 244) are defined by a unitary driving member, the driving member being pivotally mounted such that only one of the first and second ratchet drive pawls can be brought into engagement with a ratchet tooth of the gear wheel at any one time, and wherein the actuator mechanism further comprises an actuator shaft mounted for linear reciprocating movement in response to the dispensing of a dose of medicament, characteirised in that the driving member is pivotally mounted to the actuator shaft such that the reciprocating movement of the actuator shaft causes a rocking movement of the driving member.