Patent ID: 8511301

Claim:
A drug ejection device for ejecting a drug in a form of liquid droplets into an inhalation flow path and allowing a user to inhale the drug, comprising: a main body; a mouthpiece attachable to the main body and forming the inhalation flow path in cooperation with the main body; an ejector for performing normal drug ejection for inhalation and drug pre-ejection not for inhalation; and a discharger for removing drug liquid droplets ejected by the drug pre-ejection and drug liquid droplets drifting in the inhalation flow path from inside the inhalation flow path, wherein the discharger has an exhaust fan and a drug liquid droplet collecting filter constituted integrally with the mouthpiece and is disposed facing the ejector with the inhalation flow path therebetween, and wherein a driving time period of the exhaust fan is variable according to a type of the ejected drug.