[Effect of theophylline on respiratory function in patients with chronic obstructive lung disease].

The purpose of the investigation was to study the effects of small (200-mg) and mean (600-mg) daily doses of theophylline on respiratory function and the quality of life in patients with chronic obstructive lung disease during its relatively long-term therapy. By the end of the third month of therapy, dyspnea ameliorated and life quality increased in both groups of patients receiving both small and mean doses of theophylline. This was accompanied by the improved parameters of bronchial patency.