Three new prescriptions of drug plants were included into combined hospital treatment of 156 patients with chronic bronchitis. Each of the three mixtures was to treat a certain clinical form of chronic bronchitis being composed of plants with specific mechanism of action. The mixture was taken a tablespoonful 8-10 times a day. Pronounced and moderate effect of the therapy was achieved in 95.6% of those treated. This justifies the use of the mixtures as an adjuvant therapy in basic treatment of chronic bronchitis.