1. Senile chronic bronchitis: 56 patients age from 40 to 80 years old with bronchitis histories from four to 30 years took F8 or its modification for two weeks. 13 significantly improved (23.21 percent), 33 improved (58.92 percent) and 10 did not improve after the treatment (17.85 percent).Toxicity and side effects: There is no known side effect or toxicity of F8.
