A patient with a history of asthma reports using their short-acting beta-agonist (SABA) inhaler more than twice per week. What is the most appropriate next step to improve asthma control?
A:Increase the dosage of the rescue inhaler
B:Add a long-acting beta-agonist to the regimen
C:Refer for allergy testing to identify triggers
D:Add an inhaled corticosteroid to the regimen