Dispensing devices and systems for oral transmucosal administration of small volume drug dosage forms to the oral mucosa are provided. The older person’s age and the younger person’s age are used to identify a historic time period in which the older person was the same age as the younger person. Therefore, by reflecting light that would otherwise be discharged outside the keypad assembly to the inside of the light conductive plate using the reflecting plate, the light can be used. Various aspects of control of the receiver circuitry may be programmable.