My 16 year old son has asthma and is presently on Amoxicillin and Advair Inhaler and Xopenex Inhaler. Is it safe for him to take Qing Qi Hua Tan Wan? Ingredients: Radix Scutellariae (Huang Qin), Fructus Trichosanthis Cucumerinae (Gua Lou Ren), Rhizome Pinelliae Preparata (Ban Xia), Semen Armenicae Amarum (Ku Xin Ren), Fructus Aurantii Immaturus (Zhi Shi), Pericarpium Citri Reticulatae (Chen Pi), Poria (Fu Ling), Rhizoma Zingiberis Recens (Sheng Jiang). Any advice would be appreciated..