in the ejector head without breaking the surface tension of each opening when drops are to be ejected ejection switch 524 is closed closing ejection switch 524 activates the ejectors on ejector head 504 for a predetermined time interval in one embodiment the invention switch 524 is a trigger 526 after the droplet ejectors are placed in close proximity to an oral cavity a patient presses trigger 526 closing of switch 524 closing switch 524 cause the ejection of medication in a second implementation of a switch control an airspeed detector 527 controls the closing of switch 524 in particular when an inhalation by the patient causes the speed of air around the ejectors to approximately match the expected speed of ejected droplets the airspeed detector closes switch 524 the matched air speed provides an optimal air current for carrying droplets from the ejector into a patient 39 s lungs dosage setting switch 528 allows the user to adjust the dosage of medication provided by adjusting the duration of ejector operation after switch 524 is closed in the illustrated embodiment dosage setting switch 528 controls timer 532 timer 532 determines a time duration over which power is provided to piezoelectric 516 the time interval is typically proportional to the dosage set on dosage setting switch 528 when all ejectors are fired the time interval is typically the.