A 6-year-old child with asthma is prescribed albuterol as a rescue inhaler for acute exacerbations. The nurse is educating the parents about the proper use of the inhaler. Which of the following instructions is most important for the nurse to provide?

A. Use the inhaler as needed during an asthma attack, but avoid overuse is correct. Albuterol is a short-acting beta-agonist (SABA) used as a rescue inhaler to relieve acute bronchospasm. It should be used during episodes of wheezing, coughing, or shortness of breath, but parents should be instructed not to overuse it, as excessive use can cause tachycardia, tremors, and decreased effectiveness. Monitoring frequency helps identify poorly controlled asthma that may require a review of the maintenance regimen. B. Use the inhaler only when the child has difficulty breathing during physical activity is partially correct, but limiting it to activity-induced symptoms alone ignores other potential triggers, such as allergens or infections, which can also precipitate asthma attacks. Rescue inhalers are intended for all acute exacerbations, not just activity-induced ones. C. Use the inhaler every 4 hours as a preventative measure is incorrect. Albuterol is not a maintenance or preventive medication; daily scheduled use is not recommended unless prescribed for specific short-term prophylaxis (e.g., before exercise). Long-term control requires inhaled corticosteroids or other controller medications, not a SABA. D. Limit the use of the inhaler to prevent dependency on the medication is incorrect. Albuterol does not cause drug dependency, but overuse can indicate poor asthma control. The focus should be on appropriate use for symptom relief rather than fear of dependency.