An inhaler (1) device for inhalation of a medicament from a pierceable capsule (10) comprises a housing (2) for receiving a medicament, capsule, closure means (3) for closing the housing, said closure means being moveable relative to the housing; piercing means (7) suitable for piercing a medicament capsule; wherein movement of the closure means relative to the housing causes movement of the piercing means, and wherein the device comprises an air inlet (71) and an air outlet (72) defining an inhalation passage therebetween, the passage comprising one or more vents (70).