Cough is the third most common reason that patients present to physicians
for care and was responsible for 3.2% of all outpatient visits in the United
States in 2002.1 Of these visits, more than
30 million were made for a chief complaint of cough, at least 10 million of
which were made by otherwise healthy adults diagnosed with acute bronchitis;
most of these patients received an antibiotic prescription, often for a broad-spectrum
macrolide or quinolone costing US $50 to $100.1-4