The method and system according to preferred embodiments of the present invention allows an effective delivery of aerosolized medicament (e.g. a surfactant) to the patient's lungs. According to a preferred embodiment, the method of the present invention provides an efficient delivery of the aerosol medicament(possibly breath synchronized). A glass vial 101 in which medicaments are usually stored and shipped is used directly as a component of the system. Its function in the system is that of an intermittently pressurized chamber that can inject the surfactant into the catheter of the atomizer device. According to a preferred embodiment the delivery can be done in phase with the beginning of each inspiration. The main elements of the system 100 are: a source of compressed gas 103, the already mentioned medicament vial 101, a catheter 111, and optionally means 113 to detect the breathing pattern and a control unit 115.