An inhaler for delivery of a medicament by inhalation, the inhaler comprising: a dose counting mechanism comprising a counter and a translating member, the translating member comprising a pawl and the counter comprising a first count wheel, a second count wheel and an intermediate wheel engaged with the second count wheel and in selective engagement with the first count wheel, a dispensing mechanism configured, on actuation, to dispense a dose of medicament, wherein: on actuation, the dispensing mechanism moves the translating member in a substantially linear direction, whereby the pawl rotates the first count wheel, and as the first count wheel rotates, the intermediate wheel is selectively engaged thereby selectively rotating the second count wheel; wherein the dose counting mechanism further comprises a counter chassis, the counter chassis being configured to receive and to guide motion of the translating member; wherein the counter chassis further comprises a chassis pawl that is preferably integrally formed with the counter chassis, the chassis pawl configured to enable the wheels of the dose counting mechanism to rotate in a first, counting direction but to prevent rotation of at least the first count wheel in the opposite, backwards direction. a dose counting mechanism comprising a counter and a translating member, the translating member comprising a pawl and the counter comprising a first count wheel, a second count wheel and an intermediate wheel engaged with the second count wheel and in selective engagement with the first count wheel, a dispensing mechanism configured, on actuation, to dispense a dose of medicament, wherein: on actuation, the dispensing mechanism moves the translating member in a substantially linear direction, whereby the pawl rotates the first count wheel, and as the first count wheel rotates, the intermediate wheel is selectively engaged thereby selectively rotating the second count wheel; wherein the dose counting mechanism further comprises a counter chassis, the counter chassis being configured to receive and to guide motion of the translating member; wherein the counter chassis further comprises a chassis pawl that is preferably integrally formed with the counter chassis, the chassis pawl configured to enable the wheels of the dose counting mechanism to rotate in a first, counting direction but to prevent rotation of at least the first count wheel in the opposite, backwards direction. on actuation, the dispensing mechanism moves the translating member in a substantially linear direction, whereby the pawl rotates the first count wheel, and as the first count wheel rotates, the intermediate wheel is selectively engaged thereby selectively rotating the second count wheel; wherein the dose counting mechanism further comprises a counter chassis, the counter chassis being configured to receive and to guide motion of the translating member; wherein the counter chassis further comprises a chassis pawl that is preferably integrally formed with the counter chassis, the chassis pawl configured to enable the wheels of the dose counting mechanism to rotate in a first, counting direction but to prevent rotation of at least the first count wheel in the opposite, backwards direction. wherein the dose counting mechanism further comprises a counter chassis, the counter chassis being configured to receive and to guide motion of the translating member; wherein the counter chassis further comprises a chassis pawl that is preferably integrally formed with the counter chassis, the chassis pawl configured to enable the wheels of the dose counting mechanism to rotate in a first, counting direction but to prevent rotation of at least the first count wheel in the opposite, backwards direction.