In asthmatic patients cough likely originates from stimulation of intrathoracic airway receptors, and in patients with GERD, it likely originates from stimulation of esophageal receptors. However, an involvement of upper airway receptors is a possibility in both asthmatic patients because rhinitis, sinusitis, or both are common comorbidities4 and in patients with GERD because the refluxate often reaches the larynx and might go up to the rhinopharynx. Moreover, in asthmatic patients no clear relationship has been demonstrated between cough-receptor sensitivity and bronchial responsiveness,5 and persistence of cough has been reported, even after achieving good asthma control with inhaled corticosteroids (ICSs).6