A system configured to monitor one or more aspects of nebulization of a medicament, the system comprising: a sensor; and a processor configured to receive the one or more output signals generated by the sensor, and to monitor one or more aspects of the nebulization of the medicament based on the information related to the ultrasonic energy generated during the nebulization of the medicament that is conveyed by the received one or more output signals characterized in that the sensor is configured to generate one or more output signals conveying information related to ultrasonic energy generated during nebulization of the medicament; the ultrasonic energy generated during the nebulization of the medicament comprises an ultrasonic carrier signal modulated at a modulation frequency and wherein the information conveyed by the one or more output signals generated by the sensor enables detection of the modulated ultrasonic carrier signal by the processor; and the monitoring of one or more aspects of the nebulization of the medicament by the processor comprises monitoring whether a portion of the medicament remains to be nebulized, a rate of nebulization, one or more properties of the medicament being nebulized, and/or other aspects of the nebulization of the medicament. a sensor; and a processor configured to receive the one or more output signals generated by the sensor, and to monitor one or more aspects of the nebulization of the medicament based on the information related to the ultrasonic energy generated during the nebulization of the medicament that is conveyed by the received one or more output signals characterized in that the sensor is configured to generate one or more output signals conveying information related to ultrasonic energy generated during nebulization of the medicament; the ultrasonic energy generated during the nebulization of the medicament comprises an ultrasonic carrier signal modulated at a modulation frequency and wherein the information conveyed by the one or more output signals generated by the sensor enables detection of the modulated ultrasonic carrier signal by the processor; and the monitoring of one or more aspects of the nebulization of the medicament by the processor comprises monitoring whether a portion of the medicament remains to be nebulized, a rate of nebulization, one or more properties of the medicament being nebulized, and/or other aspects of the nebulization of the medicament. the sensor is configured to generate one or more output signals conveying information related to ultrasonic energy generated during nebulization of the medicament; the ultrasonic energy generated during the nebulization of the medicament comprises an ultrasonic carrier signal modulated at a modulation frequency and wherein the information conveyed by the one or more output signals generated by the sensor enables detection of the modulated ultrasonic carrier signal by the processor; and the monitoring of one or more aspects of the nebulization of the medicament by the processor comprises monitoring whether a portion of the medicament remains to be nebulized, a rate of nebulization, one or more properties of the medicament being nebulized, and/or other aspects of the nebulization of the medicament.