The invention relates to a control device (10) for a medical aerosol delivery device (2), a medical aerosol delivery system, a method for controlling a medical aerosol delivery device (2), a computer program element for controlling such device or system, and a computer readable medium having stored such computer program element. The control device is configured to provide inhalation length data and to select an aerosol delivery mode from at least a first aerosol delivery mode or a different, second aerosol delivery mode based on the provided inhalation length data. The first aerosol delivery mode and the different, second aerosol delivery mode are one of a target inhalation mode, a tidal breathing mode, a continuous aerosol delivery mode and breath-actuated delivery mode. Optionally, the control device (10) comprises a provision unit (11) and a control unit (13). The provision unit (11) is configured to provide inhalation length data. The processing unit may be configured to select either a first aerosol delivery mode or a different, second aerosol delivery mode based on the provided inhalation length data. The medical aerosol delivery system comprises an aerosol delivery device (2) and such control device (10). The control device (10) is configured to control the aerosol delivery device (2). The aerosol delivery device (2) is configured to deliver aerosol to a user.
