A system and method for dispensing metered doses of medicament to a subject that monitors one or more aspects of the dispensation. The medicament is aerosolized for dispensation to the subject so that the subject can inhale the medicament into his airway. The one or more aspects of the dispensation that are monitored based on ultrasonic energy generated by the aerosolization of the medicament. The one or more aspects of the dispensation that are monitored may include one or more of a number of doses dispensed, a number of doses remaining, whether any medicament remains to be dispensed, and/or other aspects of the dispensation of the medicament.
