Final answer:
The most appropriate action is to ask the patient to demonstrate the use of the inhaler to ensure correct usage, as improper technique can affect medication efficacy and side effects.
Step-by-step explanation:
The most appropriate action is asking the patient to demonstrate the use of the inhaler. This ensures the patient is using the device correctly, which is crucial for the medication to be effective. Moreover, improper technique can lead to less medication reaching the lungs, resulting in reduced efficacy and increased side effects like jitteriness. Auscultating lung sounds and obtaining vital signs are important but would not directly address issues with inhaler technique.
Assessing tobacco smoke exposure is relevant for overall asthma management but does not directly address the current concern. Suggesting a dose reduction without assessing use may not address the problem if the technique is incorrect.