Chronic obstructive pulmonary disease.

COPD patients are a heterogeneous group of patients who present with dyspnea and generally follow a progressive downhill course punctuated by acute infections, bronchoconstriction, or respiratory failure. Several drugs are available for relief of symptoms, including beta-agonists, anticholinergics, theophylline, and steroids. Also reviewed are the use of home oxygen and new promising agents.