[Assessment of chemoprophylaxis with intermittent tetracycline in chronic bronchitis. A functional follow-up for 3 years (author's transl)].

This study is a reappraisal for the value of intermittent tetracycline therapy in the reduction of the rate of pulmonary function alteration in patients with chronic obstructive lung disease. Two groups of patients with chronic bronchitis were randomly divided and followed up for three years. No significant differences in pulmonary function were observed between these two groups.