Efficacy and Safety of Βeta-adrenoceptor Inverse Agonist and Biased Ligand, Nadolol, In Smoking Cessation of Patients With Chronic Cough With or Without Airflow Obstruction

To test the hypothesis that treatment with the inverse agonist nadolol will improve smoking cessation in patients with chronic cough associated with long-term smoking, with or without airflow obstruction, including those with established chronic obstructive pulmonary disease (COPD) (chronic bronchitis dominant) or non-obstructive chronic bronchitis (NCB), compared to placebo and standard of care, while undergoing a validated smoking cessation program.