Chinese Herbal Medicine Formula Combined With Inhaled Corticosteroids for the Treatment of Mild to Persistent Asthma in Children

The purpose of study is to provide an objective data for evaluating the efficacy and safety of Chinese medicine (CM) formula combined with inhaled corticosteroid in the treatment of asthmatic children. Investigators will recruit eighty-six mild to moderate asthmatic children aged 4-11 years old with regular ICS usage and they will be randomized into two groups in this double-blind trial. Forty-three subjects will receive CM (CM group; Ma-Hsing-Kan-Shih-Tang in combination with Liu-Jun-Zi-Tang) and the other forty-three subjects will receive placebo (placebo group; 10% CM) for 12 weeks. Investigators will compare these two groups by questionnaires of Childhood Asthma Control Test (cACT), the Integrated Therapeutics Group Child Asthma Short Form (ITG-CASF), Pediatric Asthma Caregiver's Quality of Life Questionnaire (PACQLQ), the pulmonary function test and blood test including Complete Blood Count with Differential Count (CBC/DC), total IgE, Eosinophil Cationic Protein (ECP) and IL-4/IL-5/IL-13. Adverse events, renal and liver function test will be evaluated to investigate the safety of CM formula as well.