A client with persistent asthma is prescribed an inhaled corticosteroid. Which instruction is most important for the nurse to include in the teaching plan?

✓ Correct Answer: Option B

Rinsing the mouth after using an inhaled corticosteroid helps prevent oral candidiasis (thrush) and minimizes systemic absorption. Corticosteroids are maintenance medications, not for acute relief, and dosages should not be adjusted without medical advice.