Techniques for dynamically loading protocol stacks under signaling control are provided. It comprises a housing to receive a strip of blisters each having a puncturable lid and containing a dose of medicament for inhalation by a user, a mouthpiece through which a dose of medicament is inhaled by a user and, an actuator operable to sequentially move each blister into alignment with a blister piercing member. In another example, a processor receives the thoracic impedance signal and determines whether such thoracic impedance signal is \u201csignificant. That is, a single invocation of the built service combination will execute the sequence of services whenever desired by a usersubscriber.