Abstract: A nebulizer includes nebulization device for nebulizing a substance and a reservoir having a metering chamber arranged so as to feed a substance to be nebulized to the nebulization device and a second chamber arranged to hold and retain any of this substance in excess of the volume held in the metering chamber.

Abstract: A drug delivery apparatus comprising: a drug delivery device for selectively delivering drug-laden air or air not laden with the drug; a sensor for monitoring the breathing pattern of a patient; a controller arranged to control the drug delivery device to deliver drug-laden air in pulses which begin when the patient is monitored by the sensor to begin inhalation, the pulses having a duration which is adjusted by the controller on the basis of the monitored breathing pattern of the patient; a feedback indicator which indicates to a patient whether the monitored breathing pattern is effective for inhaling drug-laden air or not a dose calculator which calculates the dose delivered to the patient; and an indicator which indicates to the patient when a desired dose has been delivered, whereby the apparatus is configured to deliver the full amount of the desired dose in at least 80% of treatments.

Abstract: A nebulizer includes nebulization device for nebulizing a substance and a reservoir having a metering chamber arranged so as to feed a substance to be nebulized to the nebulization device and a second chamber arranged to hold and retain any of this substance in excess of the volume held in the metering chamber.