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[Six patients with pneumonitis related to blended Chinese traditional medicines].

We encountered six patients with pneumonitis related to blended chinese traditional medicine (Kampo). The duration of treatment with kampo ranged from 14 to 110 days (mean: 38 days). The most common complaints were dyspnea, fever, and dry coughing. Fine crackles were heard at the bases of both lungs. Abnormal laboratory findings included high values of C-reactive protein and glutamic-oxaloacetic transaminase in all patients, lactate dehydrogenase in 5 patients, and eosinophil count in 1 patient. Chest X-ray films and CT films revealed diffuse reticulo-nodular interstitial shadows with consolidation in both lung fields in 3 patients and pleural effusion in 1 patient. Bronchoalveolar lavage was done in 4 patients; examination of the lavage fluid showed lymphocyte alveolitis, either pure or associated with neutrophilia and eosinophilia in 3 patients. Inverted CD4/CD8 lymphocyte ratios were found in 3 patients. Transbronchial lung biopsy was done in 4 patients and specimens from 3 of those 4 showed organizing pneumonitis with thickening of alveolar septa. Lymphocyte stimulation tests were positive in 4 patients. Discontinuation of the drug (2 patients) or administration of corticosteroids (4 patients) was followed by rapid improvement. Patients being treated with kampo preparations should be observed for signs and symptoms of drug-induced pneumonitis.