The present invention provides a kind of medicinal inhalators. The inhalator may include shell, and at least partly be limited by the shell and the air flow path including air intake and air outlet slit. The inhalator may also include flow regulator and breath actuated dosage release trigger system. The flow regulator can be positioned in the air flow path between the air intake and the air outlet slit, reach adjusting volume flow rate to adjust the air-flow in the air flow path. The breath actuated dosage release trigger system can be located in the shell and can be configured to be less than the drug of the percussion volume flow rate release doses for adjusting volume flow rate.
