The Effects of Tiotropium on the Cough Reflex in Patients With Chronic Obstructive Pulmonary Disease (COPD)

Each subject will then receive Spiriva 18 ug/day for a total of 4 weeks. Each subject will be instructed by the PI on the proper use of the Spiriva inhaler and demonstrate the ability to properly perform the inhalation technique prior to leaving the laboratory. The patient will receive their first dose in the laboratory under the direct supervision of one of the investigators. In addition, subjects will be requested to take their Spiriva inhalation treatment the same time each day.