What question about adverse effects should the nurse ask a client using an inhaler?

Inquiring about mouth sores is particularly relevant for clients using inhalers, especially those that contain corticosteroids. Corticosteroids can lead to local side effects in the oropharyngeal area, such as oral thrush and mouth sores. When the medication is inhaled, it can deposit in the mouth and throat, which might increase the likelihood of developing these adverse effects. It's crucial for nurses to assess this aspect to monitor and prevent complications effectively, ensuring that clients are using their inhalers properly and maintaining oral hygiene.

In contrast, while muscle pain, feelings of increased energy, and changes in appetite can be important considerations, they are not typically associated directly with the common adverse effects seen with inhalers, particularly corticosteroid inhalers. Therefore, asking about mouth sores provides more pertinent information related to the potential adverse effects of the medication being used.