BACKGROUND
Inhaled anticholinergics and beta agonists are widely used in the treatment of patients with chronic obstructive pulmonary disease (COPD). However, dosage requirements have not been thoroughly evaluated and comparative dose-response data for these agents are limited.
METHODS
Twenty men with stable COPD of mean (SD) age 69.4 (5.8) years and FEV1 0.93 (0.38) litres were studied in ra...
