After the 5-month treatment, the levels of γ-IFN, IL-8 and TNF-αcytokines in serum and sputum in the observation group were significantly lower than those before the treatment (P<0.05) and in the control group (P<0.05).After the 10-month treatment, the above indices in the observation were further decreased when compared with those after the 5-month treatment (P<0.05), which were notably lower than those in the control group (P<0.05).There was only one case of ad-verse drug reactions in the observation group , and the patient was out of the study .