Determinants of response to bronchodilator in patients with cough variant asthma- A randomized, single-blinded, placebo-controlled study

ConclusionMore than one-third of patients with CVA do not respond to bronchodilator treatment, indicating that the response to bronchodilator should not be a diagnostic requirement of CVA. CVA patients with higher airway responsiveness will more likely respond to bronchodilator. Cough of CVA might be elicited by different mechanisms, which suggests that CVA could be divided into two phenotypes according to the response to bronchodilators.
Source: Pulmonary Pharmacology and Therapeutics - Category: Respiratory Medicine Source Type: research