Effects of Oral Doxofylline and Procaterol on Chronic Obstructive Pulmonary Disease

Each patient received 4 weeks of treatment with either doxofylline or procaterol followed by a 2-week washout period, and then 4 weeks of treatment with the other drug.

Each patient received 4 weeks of treatment with either doxofylline or procaterol followed by a 2-week washout period, and then 4 weeks of treatment with the other drug.