Abstract: A device and method is provided for delivering an active material or drug in particular form to a targeted region of the nasal passage, such as the turbinates. The device includes a nozzle outlet (28) for the material, supported for example in an outer nozzle (20) which fits the nostril so as not to disrupt non-turbulent flow into the nostril. The particles are released from the outlet (28) into the non-turbulent flow at a similar velocity, in order to follow the airstream. Thus it is possible to predict their likely path, such that preferred release points can be calculated.

Abstract: A method and device are disclosed for delivering a drug aerosol to the turbinate region (4, 6, 8) of the nasal passage. The drug is delivered to the nostril in a metered volume of gas such that it reaches the turbinates, and flow into the nostril is then prevented for sufficient time to allow the particles to settle. The particles have an aerodynamic diameter below about 12.